<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e83a7-9da8-7b44-9b18-4008b6af5264,g:0d815275-6fd3-432c-8c8b-b3577d1f6b3c-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="fun-20260628.xsd#UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e83a7-9f37-73f0-9ee2-7edc6558415d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_StatementTable_019e83a7-9f37-73f0-9ee2-7edc6558415d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e83a7-9f37-7b06-9f48-01ec12d86866" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e83a7-9f37-73f0-9ee2-7edc6558415d" xlink:to="loc_srt_ProductOrServiceAxis_019e83a7-9f37-7b06-9f48-01ec12d86866" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7b06-9f48-01ec12d86866_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e83a7-9f37-7b06-9f48-01ec12d86866" xlink:to="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7b06-9f48-01ec12d86866_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7be6-8e27-4e9386b8243b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e83a7-9f37-7b06-9f48-01ec12d86866" xlink:to="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7be6-8e27-4e9386b8243b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdmissionMember_019e83a7-9f37-7a6e-a369-6536fa3762e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdmissionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7be6-8e27-4e9386b8243b" xlink:to="loc_us-gaap_AdmissionMember_019e83a7-9f37-7a6e-a369-6536fa3762e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FoodMerchandiseandGamingMember_019e83a7-9f37-75cd-b42f-ddad759d5030" xlink:href="fun-20260628.xsd#fun_FoodMerchandiseandGamingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7be6-8e27-4e9386b8243b" xlink:to="loc_fun_FoodMerchandiseandGamingMember_019e83a7-9f37-75cd-b42f-ddad759d5030" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_AccommodationsExtraChargeProductsAndOtherMember_019e83a7-9f37-7e71-bd8d-10cea0a809a8" xlink:href="fun-20260628.xsd#fun_AccommodationsExtraChargeProductsAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e83a7-9f37-7be6-8e27-4e9386b8243b" xlink:to="loc_fun_AccommodationsExtraChargeProductsAndOtherMember_019e83a7-9f37-7e71-bd8d-10cea0a809a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019e83a7-9f37-740e-b994-6cae7943d1b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_RevenuesAbstract_019e83a7-9f37-740e-b994-6cae7943d1b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e83a7-9f37-71e0-a694-8caf5b5910bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019e83a7-9f37-740e-b994-6cae7943d1b3" xlink:to="loc_us-gaap_Revenues_019e83a7-9f37-71e0-a694-8caf5b5910bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019e83a7-9f37-711a-b98a-48a8e8edaa3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019e83a7-9f37-711a-b98a-48a8e8edaa3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_019e83a7-9f37-739d-89b1-b25b652fc096" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_019e83a7-9f37-739d-89b1-b25b652fc096" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e83a7-9f37-7a51-b84f-f0be53ca9308" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e83a7-9f37-7a51-b84f-f0be53ca9308" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019e83a7-9f37-7a9a-ba74-765e67972a31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_DepreciationAndAmortization_019e83a7-9f37-7a9a-ba74-765e67972a31" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019e83a7-9f37-7f2e-84a0-e0afd848f39d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019e83a7-9f37-7f2e-84a0-e0afd848f39d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-9f37-7e6d-8943-41248210161f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-9f37-7e6d-8943-41248210161f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-9f37-757c-a6a8-28e6fe65d09b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-9f37-757c-a6a8-28e6fe65d09b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherAssets_019e83a7-9f37-7b13-a0bb-444b594898bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherAssets_019e83a7-9f37-7b13-a0bb-444b594898bc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e83a7-9f37-7275-9f5c-f6bfb0d207d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-9f37-75d1-ab54-b4a3115f28f9" xlink:to="loc_us-gaap_CostsAndExpenses_019e83a7-9f37-7275-9f5c-f6bfb0d207d4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e83a7-9f37-75a7-b9be-dcb9079b3e3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e83a7-9f37-75a7-b9be-dcb9079b3e3a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-9f37-7720-984c-dfd6fa92578f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-9f37-7720-984c-dfd6fa92578f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-9f37-7aa0-b8fc-704fa2f6399f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-9f37-7aa0-b8fc-704fa2f6399f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e83a7-9f37-7e38-85b2-2220aa995c47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e83a7-9f37-7e38-85b2-2220aa995c47" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-9f37-75c8-916e-efa8d96ac046" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-9f37-75c8-916e-efa8d96ac046" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e83a7-9f37-7aba-b34a-73e0dfdd3513" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e83a7-9f37-7aba-b34a-73e0dfdd3513" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e83a7-9f37-7a01-93e0-7380f7457337" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_ProfitLoss_019e83a7-9f37-7a01-93e0-7380f7457337" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e83a7-9f37-74f2-8e0b-41a9824b16f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e83a7-9f37-74f2-8e0b-41a9824b16f4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e83a7-9f37-71f5-a80c-f7e30d1baf1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_NetIncomeLoss_019e83a7-9f37-71f5-a80c-f7e30d1baf1a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e83a7-9f37-724b-9678-4b3cd4a9d04b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_019e83a7-9f37-7e8b-bf1e-340d7b0baab5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_019e83a7-9f37-7e8b-bf1e-340d7b0baab5" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e83a7-9f37-74f0-8e14-af74e6d4058e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_019e83a7-9f37-7e8b-bf1e-340d7b0baab5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019e83a7-9f37-74f0-8e14-af74e6d4058e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019e83a7-9f37-7b7f-b250-49c0b4235b92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_019e83a7-9f37-7e8b-bf1e-340d7b0baab5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019e83a7-9f37-7b7f-b250-49c0b4235b92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e83a7-9f37-7ec5-8783-fddc88101097" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_019e83a7-9f37-7e8b-bf1e-340d7b0baab5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e83a7-9f37-7ec5-8783-fddc88101097" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019e83a7-9f37-739f-9a3a-77de0dbb149e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019e83a7-9f37-739f-9a3a-77de0dbb149e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_019e83a7-9f37-7939-92bb-ebe0c17c5ed8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_019e83a7-9f37-7939-92bb-ebe0c17c5ed8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e83a7-9f37-7742-b21b-ca54140f92a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e83a7-9f37-7742-b21b-ca54140f92a5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e83a7-9f37-749f-ac5d-b7971f776832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e83a7-9f37-749f-ac5d-b7971f776832" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e83a7-9f37-7b66-abb7-3802579e5c7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e83a7-9f37-749f-ac5d-b7971f776832" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e83a7-9f37-7b66-abb7-3802579e5c7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e83a7-9f37-7d55-8383-de9b25e68b14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019e83a7-9f37-749f-ac5d-b7971f776832" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e83a7-9f37-7d55-8383-de9b25e68b14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_019e83a7-9f37-72c7-a92a-c97a6598ee52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-703a-8b62-9f5fd8815e82" xlink:to="loc_us-gaap_EarningsPerShareAbstract_019e83a7-9f37-72c7-a92a-c97a6598ee52" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e83a7-9f37-74b4-8ff3-e9269d839f2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019e83a7-9f37-72c7-a92a-c97a6598ee52" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e83a7-9f37-74b4-8ff3-e9269d839f2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e83a7-9f37-7fe1-b276-2ee2d605a5be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019e83a7-9f37-72c7-a92a-c97a6598ee52" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e83a7-9f37-7fe1-b276-2ee2d605a5be" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="simple" xlink:href="fun-20260628.xsd#UNAUDITEDCONSOLIDATEDSTATEMENTSOFEQUITY"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e83a7-9f37-7426-a3bd-974a67f23c19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e83a7-9f37-7ca8-8405-a0381b46d573" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-7426-a3bd-974a67f23c19" xlink:to="loc_us-gaap_StatementTable_019e83a7-9f37-7ca8-8405-a0381b46d573" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e83a7-9f37-74c7-b32b-521329bb7872" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e83a7-9f37-7ca8-8405-a0381b46d573" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e83a7-9f37-74c7-b32b-521329bb7872" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-74c7-b32b-521329bb7872_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e83a7-9f37-74c7-b32b-521329bb7872" xlink:to="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-74c7-b32b-521329bb7872_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e83a7-9f37-74c7-b32b-521329bb7872" xlink:to="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e83a7-9f37-7afe-a3cb-e69513567c3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:to="loc_us-gaap_CommonStockMember_019e83a7-9f37-7afe-a3cb-e69513567c3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e83a7-9f37-745f-860c-b3a21116b46e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e83a7-9f37-745f-860c-b3a21116b46e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e83a7-9f37-7e0b-a5e4-bdfc824a4825" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:to="loc_us-gaap_RetainedEarningsMember_019e83a7-9f37-7e0b-a5e4-bdfc824a4825" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e83a7-9f37-7b50-91ec-d2ac9b21ed07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e83a7-9f37-79bf-aafc-a4129b29f642" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e83a7-9f37-7b50-91ec-d2ac9b21ed07" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e83a7-9f37-7426-a3bd-974a67f23c19" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e83a7-9f37-79ca-bbed-dc35887fc7c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e83a7-9f37-79ca-bbed-dc35887fc7c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e83a7-9f37-7adb-a4b1-dd3e13f0debc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_StockholdersEquity_019e83a7-9f37-7adb-a4b1-dd3e13f0debc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e83a7-9f37-7993-be94-39caa1764040" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_NetIncomeLoss_019e83a7-9f37-7993-be94-39caa1764040" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_019e83a7-9f37-76d1-a0fc-71057b148051" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross_019e83a7-9f37-76d1-a0fc-71057b148051" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation_019e83a7-9f37-7edf-b2ad-9516fd219ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation_019e83a7-9f37-7edf-b2ad-9516fd219ee5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019e83a7-9f37-7f3a-842a-6eddcda9e694" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019e83a7-9f37-7f3a-842a-6eddcda9e694" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_019e83a7-9f37-7caa-9812-0da06027ae54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e83a7-9f37-766d-b4bf-403cc5064c82" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_019e83a7-9f37-7caa-9812-0da06027ae54" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e83a7-9f37-7504-a199-1ef1e0f7cfee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e83a7-9f37-7445-9202-659f918a5b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/DescriptionoftheBusinessandSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#DescriptionoftheBusinessandSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/DescriptionoftheBusinessandSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019fb735-5790-718c-ade5-7dc4ed7d43e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:to="loc_us-gaap_LossContingenciesTable_019fb735-5790-718c-ade5-7dc4ed7d43e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019fb735-5790-764b-9748-76573a96905a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019fb735-5790-718c-ade5-7dc4ed7d43e9" xlink:to="loc_srt_LitigationCaseAxis_019fb735-5790-764b-9748-76573a96905a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019fb735-5790-764b-9748-76573a96905a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019fb735-5790-764b-9748-76573a96905a" xlink:to="loc_srt_LitigationCaseTypeDomain_019fb735-5790-764b-9748-76573a96905a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019fb735-5790-7963-a9fa-105dc9c6771c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019fb735-5790-764b-9748-76573a96905a" xlink:to="loc_srt_LitigationCaseTypeDomain_019fb735-5790-7963-a9fa-105dc9c6771c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SecuritiesClassActionLawsuitsMember_019fb735-5790-7388-8907-3ea1a41ab584" xlink:href="fun-20260628.xsd#fun_SecuritiesClassActionLawsuitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019fb735-5790-7963-a9fa-105dc9c6771c" xlink:to="loc_fun_SecuritiesClassActionLawsuitsMember_019fb735-5790-7388-8907-3ea1a41ab584" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PercentageOfParkAttendanceAndRevenueDuringPeakPeriod_019e83a7-9f38-710b-b3de-6fe6fecdd95a" xlink:href="fun-20260628.xsd#fun_PercentageOfParkAttendanceAndRevenueDuringPeakPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:to="loc_fun_PercentageOfParkAttendanceAndRevenueDuringPeakPeriod_019e83a7-9f38-710b-b3de-6fe6fecdd95a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_019fb735-5790-7716-8331-aa280cc3e5de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_019fb735-5790-7716-8331-aa280cc3e5de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivableCurrent_019fb735-5790-7a9e-80a8-115cd4b63bb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InsuranceSettlementsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:to="loc_us-gaap_InsuranceSettlementsReceivableCurrent_019fb735-5790-7a9e-80a8-115cd4b63bb5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_019fb735-5790-7b90-8d38-de8fb56f3b5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyAccrualCarryingValueCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019fb735-5790-79c7-ba59-bd0a360c62aa" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_019fb735-5790-7b90-8d38-de8fb56f3b5d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/MergersNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#MergersNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/MergersNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e83a7-9f38-72f1-9cb2-1b2b9a113634" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:to="loc_dei_LegalEntityAxis_019e83a7-9f38-72f1-9cb2-1b2b9a113634" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e83a7-9f38-72f1-9cb2-1b2b9a113634_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e83a7-9f38-72f1-9cb2-1b2b9a113634" xlink:to="loc_dei_EntityDomain_019e83a7-9f38-72f1-9cb2-1b2b9a113634_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e83a7-9f38-708e-8253-7e5f459d8069" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e83a7-9f38-72f1-9cb2-1b2b9a113634" xlink:to="loc_dei_EntityDomain_019e83a7-9f38-708e-8253-7e5f459d8069" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-788b-a5ee-10ae90ca3b5b" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e83a7-9f38-708e-8253-7e5f459d8069" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-788b-a5ee-10ae90ca3b5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e83a7-9f38-76f8-8c8f-6b907574a6ca" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:to="loc_srt_CounterpartyNameAxis_019e83a7-9f38-76f8-8c8f-6b907574a6ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-76f8-8c8f-6b907574a6ca_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e83a7-9f38-76f8-8c8f-6b907574a6ca" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-76f8-8c8f-6b907574a6ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-73a7-ae8f-3f67f75b3b75" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e83a7-9f38-76f8-8c8f-6b907574a6ca" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-73a7-ae8f-3f67f75b3b75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-74c3-8a1b-f7c834b4c03b" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-73a7-ae8f-3f67f75b3b75" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-74c3-8a1b-f7c834b4c03b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsMember_019e83a7-9f38-7940-9bc6-6c434ec05e07" xlink:href="fun-20260628.xsd#fun_SixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e83a7-9f38-73a7-ae8f-3f67f75b3b75" xlink:to="loc_fun_SixFlagsMember_019e83a7-9f38-7940-9bc6-6c434ec05e07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019e83a7-9f38-751d-8bc0-e7a1db83558d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:to="loc_srt_OwnershipAxis_019e83a7-9f38-751d-8bc0-e7a1db83558d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e83a7-9f38-751d-8bc0-e7a1db83558d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019e83a7-9f38-751d-8bc0-e7a1db83558d" xlink:to="loc_srt_OwnershipDomain_019e83a7-9f38-751d-8bc0-e7a1db83558d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e83a7-9f38-7f7f-8757-b3cbe9d650b1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019e83a7-9f38-751d-8bc0-e7a1db83558d" xlink:to="loc_srt_OwnershipDomain_019e83a7-9f38-7f7f-8757-b3cbe9d650b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsMember_019e83a7-9f38-7989-8d72-5bfc40773cb5" xlink:href="fun-20260628.xsd#fun_SixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e83a7-9f38-7f7f-8757-b3cbe9d650b1" xlink:to="loc_fun_SixFlagsMember_019e83a7-9f38-7989-8d72-5bfc40773cb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsEntertainmentCorporationMember_019e83a7-9f38-7893-9d34-7b752ef67e95" xlink:href="fun-20260628.xsd#fun_SixFlagsEntertainmentCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e83a7-9f38-7f7f-8757-b3cbe9d650b1" xlink:to="loc_fun_SixFlagsEntertainmentCorporationMember_019e83a7-9f38-7893-9d34-7b752ef67e95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7574-89f9-e73949250491" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7507-aa62-a213871e4665" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7574-89f9-e73949250491" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7574-89f9-e73949250491_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7574-89f9-e73949250491" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7574-89f9-e73949250491_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-72d5-8d47-8bb2156a2ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7574-89f9-e73949250491" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-72d5-8d47-8bb2156a2ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7262-9e64-405aca6a0531" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-72d5-8d47-8bb2156a2ca1" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7262-9e64-405aca6a0531" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_MergerAgreementEquityInterestsIssuedAndIssuableEntitySharesIssuedPerShare_019e83a7-9f38-7271-b9f0-5f452fa71dcf" xlink:href="fun-20260628.xsd#fun_MergerAgreementEquityInterestsIssuedAndIssuableEntitySharesIssuedPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_fun_MergerAgreementEquityInterestsIssuedAndIssuableEntitySharesIssuedPerShare_019e83a7-9f38-7271-b9f0-5f452fa71dcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e83a7-9f38-79ea-ad8e-dd7557a0e541" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e83a7-9f38-79ea-ad8e-dd7557a0e541" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_MergerAgreementEquityInterestsIssuedAndIssuableExchangeRatio_019e83a7-9f38-7863-b1e7-29e84b1e4503" xlink:href="fun-20260628.xsd#fun_MergerAgreementEquityInterestsIssuedAndIssuableExchangeRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_fun_MergerAgreementEquityInterestsIssuedAndIssuableExchangeRatio_019e83a7-9f38-7863-b1e7-29e84b1e4503" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_MergerAgreementOwnershipInterest_019e83a7-9f38-70a7-8439-a5383ca0d8a7" xlink:href="fun-20260628.xsd#fun_MergerAgreementOwnershipInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_fun_MergerAgreementOwnershipInterest_019e83a7-9f38-70a7-8439-a5383ca0d8a7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019e83a7-9f38-75ea-86b5-77b29bc43c77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7d7b-a12c-e22342fabce1" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019e83a7-9f38-75ea-86b5-77b29bc43c77" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/MergersScheduleofComputationofEstimatedFairvalueofConsiderationTransferredDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#MergersScheduleofComputationofEstimatedFairvalueofConsiderationTransferredDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/MergersScheduleofComputationofEstimatedFairvalueofConsiderationTransferredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7293-ae9c-3b948c7c0ae7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7293-ae9c-3b948c7c0ae7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7293-ae9c-3b948c7c0ae7" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7270-93fa-1785f9906ad1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-79d8-8c2b-0440ac2cd6f6" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7270-93fa-1785f9906ad1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-72ce-aa67-c4ba4d36fc01" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7270-93fa-1785f9906ad1" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-72ce-aa67-c4ba4d36fc01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019e83a7-9f38-7026-ba6c-d5c90b7999b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityInterestIssuedOrIssuableByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7293-ae9c-3b948c7c0ae7" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019e83a7-9f38-7026-ba6c-d5c90b7999b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-7026-ba6c-d5c90b7999b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019e83a7-9f38-7026-ba6c-d5c90b7999b7" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-7026-ba6c-d5c90b7999b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-76fa-acb6-ce5e34c5d548" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityInterestIssuedOrIssuableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableByTypeAxis_019e83a7-9f38-7026-ba6c-d5c90b7999b7" xlink:to="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-76fa-acb6-ce5e34c5d548" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e83a7-9f38-78e1-8bd2-5f2dcc961682" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-76fa-acb6-ce5e34c5d548" xlink:to="loc_us-gaap_CommonStockMember_019e83a7-9f38-78e1-8bd2-5f2dcc961682" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_019e83a7-9f38-7c11-b001-3df612134b49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityInterestIssuedOrIssuableTypeDomain_019e83a7-9f38-76fa-acb6-ce5e34c5d548" xlink:to="loc_us-gaap_StockCompensationPlanMember_019e83a7-9f38-7c11-b001-3df612134b49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e83a7-9f38-71e7-8d2c-14b8fb2d9439" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7293-ae9c-3b948c7c0ae7" xlink:to="loc_dei_LegalEntityAxis_019e83a7-9f38-71e7-8d2c-14b8fb2d9439" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e83a7-9f38-71e7-8d2c-14b8fb2d9439_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e83a7-9f38-71e7-8d2c-14b8fb2d9439" xlink:to="loc_dei_EntityDomain_019e83a7-9f38-71e7-8d2c-14b8fb2d9439_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e83a7-9f38-79ec-a9cd-a2f5198a1676" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e83a7-9f38-71e7-8d2c-14b8fb2d9439" xlink:to="loc_dei_EntityDomain_019e83a7-9f38-79ec-a9cd-a2f5198a1676" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7f92-8781-3d50ff107fe5" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e83a7-9f38-79ec-a9cd-a2f5198a1676" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7f92-8781-3d50ff107fe5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019e83a7-9f38-7285-8052-8f49b9cafd8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019e83a7-9f38-7285-8052-8f49b9cafd8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationConsiderationTransferredRepaymentOfDebt_019e83a7-9f38-7a3d-856e-db7ce39fb306" xlink:href="fun-20260628.xsd#fun_BusinessCombinationConsiderationTransferredRepaymentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_fun_BusinessCombinationConsiderationTransferredRepaymentOfDebt_019e83a7-9f38-7a3d-856e-db7ce39fb306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationConsiderationTransferredPaymentOfDividends_019e83a7-9f38-7faf-82f1-f36c247b7c7c" xlink:href="fun-20260628.xsd#fun_BusinessCombinationConsiderationTransferredPaymentOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_fun_BusinessCombinationConsiderationTransferredPaymentOfDividends_019e83a7-9f38-7faf-82f1-f36c247b7c7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019e83a7-9f38-7c59-a772-c6aa70db3e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019e83a7-9f38-7c59-a772-c6aa70db3e9d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_019e83a7-9f38-7bd1-9b6a-9faf5075133c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_019e83a7-9f38-7bd1-9b6a-9faf5075133c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_019e83a7-9f38-76b6-8125-7c1d304d2d16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_019e83a7-9f38-76b6-8125-7c1d304d2d16" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationConsiderationTransferredIncludingRedeemableNoncontrollingInterestNetOfCashAcquired_019e83a7-9f38-700d-9e8b-eda6f68b448d" xlink:href="fun-20260628.xsd#fun_BusinessCombinationConsiderationTransferredIncludingRedeemableNoncontrollingInterestNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_fun_BusinessCombinationConsiderationTransferredIncludingRedeemableNoncontrollingInterestNetOfCashAcquired_019e83a7-9f38-700d-9e8b-eda6f68b448d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019e83a7-9f38-790a-af90-3af465a6b862" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019e83a7-9f38-790a-af90-3af465a6b862" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CommonStockDividendComponentPerShareDeclared_019e83a7-9f38-77ce-96e3-7a4a0590f9cd" xlink:href="fun-20260628.xsd#fun_CommonStockDividendComponentPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_fun_CommonStockDividendComponentPerShareDeclared_019e83a7-9f38-77ce-96e3-7a4a0590f9cd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PartnersCapitalAccountDividendDeclaredPerShare_019e83a7-9f38-7b17-a5be-8344bdbc351d" xlink:href="fun-20260628.xsd#fun_PartnersCapitalAccountDividendDeclaredPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7568-9b81-2e55d13771d2" xlink:to="loc_fun_PartnersCapitalAccountDividendDeclaredPerShare_019e83a7-9f38-7b17-a5be-8344bdbc351d" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/MergersScheduleofPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#MergersScheduleofPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/MergersScheduleofPurchasePriceAllocationofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7b6a-9e93-c2d0f83bb976" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7759-bc4a-4d2363fb14aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7b6a-9e93-c2d0f83bb976" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7759-bc4a-4d2363fb14aa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7211-9561-38c46109213e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-7759-bc4a-4d2363fb14aa" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7211-9561-38c46109213e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7211-9561-38c46109213e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7211-9561-38c46109213e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7211-9561-38c46109213e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7bf5-b73d-dff12db04825" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019e83a7-9f38-7211-9561-38c46109213e" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7bf5-b73d-dff12db04825" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7d29-b7d5-e65f5dc60a5e" xlink:href="fun-20260628.xsd#fun_FormerSixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019e83a7-9f38-7bf5-b73d-dff12db04825" xlink:to="loc_fun_FormerSixFlagsMember_019e83a7-9f38-7d29-b7d5-e65f5dc60a5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7b6a-9e93-c2d0f83bb976" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019e83a7-9f38-7aae-8112-6bbd172911a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019e83a7-9f38-7aae-8112-6bbd172911a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019e83a7-9f38-7590-b9fd-13f0db3373da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019e83a7-9f38-7590-b9fd-13f0db3373da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019e83a7-9f38-7b64-b687-0dfeb5c10613" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_019e83a7-9f38-7b64-b687-0dfeb5c10613" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019e83a7-9f38-7d6b-a75e-d97525a14412" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019e83a7-9f38-7d6b-a75e-d97525a14412" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_019e83a7-9f38-7c02-a51e-1bdeacfcef7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_019e83a7-9f38-7c02-a51e-1bdeacfcef7b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets_019e83a7-9f38-798a-9230-db5044764429" xlink:href="fun-20260628.xsd#fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets_019e83a7-9f38-798a-9230-db5044764429" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019e83a7-9f38-7ce5-a004-5cf3f2b41bb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019e83a7-9f38-7ce5-a004-5cf3f2b41bb8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019e83a7-9f38-7330-b083-30ce165ca5a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_019e83a7-9f38-7330-b083-30ce165ca5a4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_019e83a7-9f38-781e-b14b-c9486dd11dee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt_019e83a7-9f38-781e-b14b-c9486dd11dee" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019e83a7-9f38-762a-9d22-8c009a070c62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019e83a7-9f38-762a-9d22-8c009a070c62" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_019e83a7-9f38-71e7-8d5d-cd6c8bfb789c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_019e83a7-9f38-71e7-8d5d-cd6c8bfb789c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesInterestPayable_019e83a7-9f38-7e2b-b648-df8dab0ecae2" xlink:href="fun-20260628.xsd#fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesInterestPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesInterestPayable_019e83a7-9f38-7e2b-b648-df8dab0ecae2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedIncomeTaxes_019e83a7-9f38-761b-9a6e-35a62ed6e77c" xlink:href="fun-20260628.xsd#fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedIncomeTaxes_019e83a7-9f38-761b-9a6e-35a62ed6e77c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesEmployeeRelatedLiabilities_019e83a7-9f38-7f74-a471-c4310dd385f4" xlink:href="fun-20260628.xsd#fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesEmployeeRelatedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesEmployeeRelatedLiabilities_019e83a7-9f38-7f74-a471-c4310dd385f4" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesSelfInsuranceReserve_019e83a7-9f38-78f2-9376-237d715bb33a" xlink:href="fun-20260628.xsd#fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesSelfInsuranceReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_fun_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesSelfInsuranceReserve_019e83a7-9f38-78f2-9376-237d715bb33a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_019e83a7-9f38-7f8e-90e6-65224ddc71b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_019e83a7-9f38-7f8e-90e6-65224ddc71b0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019e83a7-9f38-7824-b9e0-1dd95f3a6f1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019e83a7-9f38-7824-b9e0-1dd95f3a6f1e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation_019e83a7-9f38-7044-a3ad-e4d3d24a1a48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation_019e83a7-9f38-7044-a3ad-e4d3d24a1a48" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019e83a7-9f38-7e91-a489-b3b5a50ce9ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019e83a7-9f38-7e91-a489-b3b5a50ce9ea" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_019e83a7-9f38-7799-bdbc-2b2fec6c63b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_019e83a7-9f38-7799-bdbc-2b2fec6c63b2" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019e83a7-9f38-7315-ba36-06b635f6fadc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019e83a7-9f38-7315-ba36-06b635f6fadc" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_019e83a7-9f38-7bea-a1b7-0fc97ac94087" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_019e83a7-9f38-7bea-a1b7-0fc97ac94087" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019e83a7-9f38-7ef6-a621-31cb70fd4778" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_Goodwill_019e83a7-9f38-7ef6-a621-31cb70fd4778" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019e83a7-9f38-728b-bbad-ce5df19dc355" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_019e83a7-9f38-788a-9eb5-f3c318475b90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019e83a7-9f38-728b-bbad-ce5df19dc355" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-7b6a-9e93-c2d0f83bb976" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssetsReceivables_019e83a7-9f38-7d5f-91e1-e776868adf33" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentAssetsReceivables_019e83a7-9f38-7d5f-91e1-e776868adf33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_019e83a7-9f38-7069-b883-628b2647492e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_019e83a7-9f38-7069-b883-628b2647492e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherCurrentAssets_019e83a7-9f38-7407-b1c1-037e9ea9a84e" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherCurrentAssets_019e83a7-9f38-7407-b1c1-037e9ea9a84e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_019e83a7-9f38-7b38-bc4a-032182b5c930" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_019e83a7-9f38-7b38-bc4a-032182b5c930" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_019e83a7-9f38-75f6-aa55-21890fae9370" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_019e83a7-9f38-75f6-aa55-21890fae9370" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRightOfUseAssets_019e83a7-9f38-7f1f-9f7f-b0b4bf8d948c" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentRightOfUseAssets_019e83a7-9f38-7f1f-9f7f-b0b4bf8d948c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherNoncurrentAssets_019e83a7-9f38-7a27-a19a-24005dfcf0db" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherNoncurrentAssets_019e83a7-9f38-7a27-a19a-24005dfcf0db" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets_019e83a7-9f38-741f-9d8f-35467fd79ca3" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAssets_019e83a7-9f38-741f-9d8f-35467fd79ca3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesLongTermDebt_019e83a7-9f38-74c9-93bf-c7ddca4339f8" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesLongTermDebt_019e83a7-9f38-74c9-93bf-c7ddca4339f8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesAccountsPayable_019e83a7-9f38-72d9-b51f-5182a8e347b9" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesAccountsPayable_019e83a7-9f38-72d9-b51f-5182a8e347b9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesDeferredRevenue_019e83a7-9f38-76ff-b8e8-b51fc56b332f" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesDeferredRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCurrentLiabilitiesDeferredRevenue_019e83a7-9f38-76ff-b8e8-b51fc56b332f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedInterest_019e83a7-9f38-7023-b4d4-a2ada9ea2f28" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedInterest_019e83a7-9f38-7023-b4d4-a2ada9ea2f28" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedTaxes_019e83a7-9f38-7840-9468-1160c3525f04" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedTaxes_019e83a7-9f38-7840-9468-1160c3525f04" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedSalariesWagesAndBenefits_019e83a7-9f38-7e58-af9b-af6ba7eb7731" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedSalariesWagesAndBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedSalariesWagesAndBenefits_019e83a7-9f38-7e58-af9b-af6ba7eb7731" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSelfInsuranceReserves_019e83a7-9f38-7a7a-a634-2d4e0fefe81a" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSelfInsuranceReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSelfInsuranceReserves_019e83a7-9f38-7a7a-a634-2d4e0fefe81a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAccruedLiabilities_019e83a7-9f38-7981-9221-3020fca9c80b" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAccruedLiabilities_019e83a7-9f38-7981-9221-3020fca9c80b" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities_019e83a7-9f38-7063-b88f-21d797a4b028" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities_019e83a7-9f38-7063-b88f-21d797a4b028" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLeaseObligation_019e83a7-9f38-7f98-b533-0f7775f944c6" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLeaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLeaseObligation_019e83a7-9f38-7f98-b533-0f7775f944c6" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilitiesOther_019e83a7-9f38-720f-83f8-554e95591342" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentNoncurrentLiabilitiesOther_019e83a7-9f38-720f-83f8-554e95591342" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLongTermDebt_019e83a7-9f38-7edf-99c2-53569e3f9f76" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLongTermDebt_019e83a7-9f38-7edf-99c2-53569e3f9f76" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities_019e83a7-9f38-7ade-8b2b-ef50cfa99c53" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities_019e83a7-9f38-7ade-8b2b-ef50cfa99c53" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferredExcludeGoodwill_019e83a7-9f38-766e-a69c-d12583340f56" xlink:href="fun-20260628.xsd#fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferredExcludeGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_fun_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferredExcludeGoodwill_019e83a7-9f38-766e-a69c-d12583340f56" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019e83a7-9f38-74d3-bd78-8c7c975661a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_019e83a7-9f38-74d3-bd78-8c7c975661a3" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_019e83a7-9f38-7f1d-98cd-849f4e894455" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsAbstract_019e83a7-9f38-76d2-8a78-698666495621" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_019e83a7-9f38-7f1d-98cd-849f4e894455" xlink:type="arc" order="24"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/RevenueRecognitionDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#RevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/RevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e83a7-9f38-7ec1-82c0-5fec4a5f2db6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e83a7-9f38-7ec1-82c0-5fec4a5f2db6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e83a7-9f38-7871-b8d5-81dc568ad699" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e83a7-9f38-7ec1-82c0-5fec4a5f2db6" xlink:to="loc_srt_RangeAxis_019e83a7-9f38-7871-b8d5-81dc568ad699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e83a7-9f38-7871-b8d5-81dc568ad699_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e83a7-9f38-7871-b8d5-81dc568ad699" xlink:to="loc_srt_RangeMember_019e83a7-9f38-7871-b8d5-81dc568ad699_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e83a7-9f38-7649-abdc-407092b5315a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e83a7-9f38-7871-b8d5-81dc568ad699" xlink:to="loc_srt_RangeMember_019e83a7-9f38-7649-abdc-407092b5315a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e83a7-9f38-7bf5-8c01-f3ac6297e7fb" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e83a7-9f38-7649-abdc-407092b5315a" xlink:to="loc_srt_MinimumMember_019e83a7-9f38-7bf5-8c01-f3ac6297e7fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e83a7-9f38-79c3-8faf-1148a971e488" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e83a7-9f38-7649-abdc-407092b5315a" xlink:to="loc_srt_MaximumMember_019e83a7-9f38-79c3-8faf-1148a971e488" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemAxis_019e83a7-9f38-78aa-bf04-0066b964ebb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnusualOrInfrequentItemAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e83a7-9f38-7ec1-82c0-5fec4a5f2db6" xlink:to="loc_us-gaap_UnusualOrInfrequentItemAxis_019e83a7-9f38-78aa-bf04-0066b964ebb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_019e83a7-9f38-78aa-bf04-0066b964ebb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnusualOrInfrequentItemDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_019e83a7-9f38-78aa-bf04-0066b964ebb4" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_019e83a7-9f38-78aa-bf04-0066b964ebb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_019e83a7-9f38-7199-98fe-5649ac1d070b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnusualOrInfrequentItemDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_019e83a7-9f38-78aa-bf04-0066b964ebb4" xlink:to="loc_us-gaap_UnusualOrInfrequentItemDomain_019e83a7-9f38-7199-98fe-5649ac1d070b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PandemicCOVID19Member_019e83a7-9f38-7d01-b871-1acacfca156a" xlink:href="fun-20260628.xsd#fun_PandemicCOVID19Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemDomain_019e83a7-9f38-7199-98fe-5649ac1d070b" xlink:to="loc_fun_PandemicCOVID19Member_019e83a7-9f38-7d01-b871-1acacfca156a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_ContractWithCustomerRevenueRecognitionBasedOnNumberOfUsesExpectedMembershipTermUsed_019e83a7-9f38-7311-91a2-e8cb0fadcd88" xlink:href="fun-20260628.xsd#fun_ContractWithCustomerRevenueRecognitionBasedOnNumberOfUsesExpectedMembershipTermUsed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_fun_ContractWithCustomerRevenueRecognitionBasedOnNumberOfUsesExpectedMembershipTermUsed_019e83a7-9f38-7311-91a2-e8cb0fadcd88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e83a7-9f38-739c-a513-9cf44dad4465" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e83a7-9f38-739c-a513-9cf44dad4465" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_ContractWithCustomerLiabilityPercentageSeasonLongProducts_019e83a7-9f38-7af7-adcf-8cbc238fca24" xlink:href="fun-20260628.xsd#fun_ContractWithCustomerLiabilityPercentageSeasonLongProducts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_fun_ContractWithCustomerLiabilityPercentageSeasonLongProducts_019e83a7-9f38-7af7-adcf-8cbc238fca24" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e83a7-9f38-78d6-811d-090f95b3d52e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e83a7-9f38-78d6-811d-090f95b3d52e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e83a7-9f38-7fe8-bf52-6a003ccba1e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019e83a7-9f38-7fe8-bf52-6a003ccba1e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RevenueNumberOfMonthlyInstallmentsPerPurchasePlan_019e83a7-9f38-752d-8676-bf1475812951" xlink:href="fun-20260628.xsd#fun_RevenueNumberOfMonthlyInstallmentsPerPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_fun_RevenueNumberOfMonthlyInstallmentsPerPurchasePlan_019e83a7-9f38-752d-8676-bf1475812951" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RevenuePaymentTermsForBilling_019e83a7-9f38-7cf8-a080-1b8786ca5704" xlink:href="fun-20260628.xsd#fun_RevenuePaymentTermsForBilling"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_fun_RevenuePaymentTermsForBilling_019e83a7-9f38-7cf8-a080-1b8786ca5704" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019e83a7-9f38-7acd-8b12-377f3f127317" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e83a7-9f38-7e1c-9d92-03151133708e" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019e83a7-9f38-7acd-8b12-377f3f127317" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/LongLivedAssetsScheduleofClassificationofPropertyandEquipmentDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#LongLivedAssetsScheduleofClassificationofPropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/LongLivedAssetsScheduleofClassificationofPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-7066-8db3-2d6e96934d0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-7b85-8ae2-0119511b95b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-7066-8db3-2d6e96934d0d" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-7b85-8ae2-0119511b95b4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e83a7-9f38-75fe-8243-8000b113e897" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-7b85-8ae2-0119511b95b4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e83a7-9f38-75fe-8243-8000b113e897" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-75fe-8243-8000b113e897_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e83a7-9f38-75fe-8243-8000b113e897" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-75fe-8243-8000b113e897_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e83a7-9f38-75fe-8243-8000b113e897" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019e83a7-9f38-766a-821b-97d82dcf7bf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:to="loc_us-gaap_LandMember_019e83a7-9f38-766a-821b-97d82dcf7bf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandImprovementsMember_019e83a7-9f38-7e16-832b-35cf4910820a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:to="loc_us-gaap_LandImprovementsMember_019e83a7-9f38-7e16-832b-35cf4910820a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019e83a7-9f38-78a6-9c8f-ffa6c83cff3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:to="loc_us-gaap_BuildingMember_019e83a7-9f38-78a6-9c8f-ffa6c83cff3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RidesAndEquipmentMember_019e83a7-9f38-7256-9bc2-d6be8d244f54" xlink:href="fun-20260628.xsd#fun_RidesAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:to="loc_fun_RidesAndEquipmentMember_019e83a7-9f38-7256-9bc2-d6be8d244f54" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019e83a7-9f38-7ad0-9be4-34d4d8b1674f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e83a7-9f38-77b4-9252-d0a57eb60fab" xlink:to="loc_us-gaap_ConstructionInProgressMember_019e83a7-9f38-7ad0-9be4-34d4d8b1674f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019e83a7-9f38-7d83-8ed3-b11eb7aaad7d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-7066-8db3-2d6e96934d0d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019e83a7-9f38-7d83-8ed3-b11eb7aaad7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019e83a7-9f38-75cb-8555-8c933402a442" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-7066-8db3-2d6e96934d0d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019e83a7-9f38-75cb-8555-8c933402a442" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e83a7-9f38-78ae-8269-8321b375b693" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-7066-8db3-2d6e96934d0d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e83a7-9f38-78ae-8269-8321b375b693" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/LongLivedAssetsNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#LongLivedAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/LongLivedAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-74d5-8c0b-d45726579bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-74d5-8c0b-d45726579bd0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-9f38-78b3-ad01-55cb05b16ec8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-74d5-8c0b-d45726579bd0" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-9f38-78b3-ad01-55cb05b16ec8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-78b3-ad01-55cb05b16ec8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-9f38-78b3-ad01-55cb05b16ec8" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-78b3-ad01-55cb05b16ec8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-709e-b754-a5036ddd5a27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-9f38-78b3-ad01-55cb05b16ec8" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-709e-b754-a5036ddd5a27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperationsMarketedForRedevelopmentMember_019e83a7-9f38-727b-a76e-a86a5fcce950" xlink:href="fun-20260628.xsd#fun_DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperationsMarketedForRedevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-709e-b754-a5036ddd5a27" xlink:to="loc_fun_DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperationsMarketedForRedevelopmentMember_019e83a7-9f38-727b-a76e-a86a5fcce950" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019fbd54-04d0-7825-ab7b-21e70b7c9359" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-9f38-709e-b754-a5036ddd5a27" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019fbd54-04d0-7825-ab7b-21e70b7c9359" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-9f38-781c-8688-a90e4201bb16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-74d5-8c0b-d45726579bd0" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-9f38-781c-8688-a90e4201bb16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-781c-8688-a90e4201bb16_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-9f38-781c-8688-a90e4201bb16" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-781c-8688-a90e4201bb16_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-706c-b40a-4fc986ac805c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-9f38-781c-8688-a90e4201bb16" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-706c-b40a-4fc986ac805c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsAmericanAndHurricaneHarborMember_019e83a7-9f38-7689-8db5-835c261082ff" xlink:href="fun-20260628.xsd#fun_SixFlagsAmericanAndHurricaneHarborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-706c-b40a-4fc986ac805c" xlink:to="loc_fun_SixFlagsAmericanAndHurricaneHarborMember_019e83a7-9f38-7689-8db5-835c261082ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SevenParksMember_019e83a7-9f38-70fb-ad79-f84dbb64c164" xlink:href="fun-20260628.xsd#fun_SevenParksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-9f38-706c-b40a-4fc986ac805c" xlink:to="loc_fun_SevenParksMember_019e83a7-9f38-70fb-ad79-f84dbb64c164" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e83a7-9f38-723d-96b0-c921548d3299" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e83a7-9f38-74d5-8c0b-d45726579bd0" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e83a7-9f38-723d-96b0-c921548d3299" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019e83a7-9f38-723d-96b0-c921548d3299_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e83a7-9f38-723d-96b0-c921548d3299" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019e83a7-9f38-723d-96b0-c921548d3299_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019e83a7-9f38-7b47-9e79-bdd56538bab1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e83a7-9f38-723d-96b0-c921548d3299" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019e83a7-9f38-7b47-9e79-bdd56538bab1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SecondaryGuarantorForLeaseMember_019e83a7-9f38-7dbb-8a12-9dd733cd6692" xlink:href="fun-20260628.xsd#fun_SecondaryGuarantorForLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019e83a7-9f38-7b47-9e79-bdd56538bab1" xlink:to="loc_fun_SecondaryGuarantorForLeaseMember_019e83a7-9f38-7dbb-8a12-9dd733cd6692" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfLand_019e83a7-9f38-7e65-849a-8afac701260a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AreaOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_us-gaap_AreaOfLand_019e83a7-9f38-7e65-849a-8afac701260a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_EstimatedIncreaseInDepreciation_019e83a7-9f38-7f26-b1a2-2df1cd493a55" xlink:href="fun-20260628.xsd#fun_EstimatedIncreaseInDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_fun_EstimatedIncreaseInDepreciation_019e83a7-9f38-7f26-b1a2-2df1cd493a55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019e83a7-9f38-75f3-a472-1e6902e5489e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_019e83a7-9f38-75f3-a472-1e6902e5489e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DisposalGroupWorkingCapitalAdjustments_019fbd63-55fd-7736-9715-73ff457337af" xlink:href="fun-20260628.xsd#fun_DisposalGroupWorkingCapitalAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_fun_DisposalGroupWorkingCapitalAdjustments_019fbd63-55fd-7736-9715-73ff457337af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DisposalGroupIncludingDiscontinuedOperationOwnershipPercentageInDisposedAsset_019e83a7-9f38-7826-9fe5-6f47679f6ce8" xlink:href="fun-20260628.xsd#fun_DisposalGroupIncludingDiscontinuedOperationOwnershipPercentageInDisposedAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_fun_DisposalGroupIncludingDiscontinuedOperationOwnershipPercentageInDisposedAsset_019e83a7-9f38-7826-9fe5-6f47679f6ce8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-9f38-7fca-8dc4-85cc45b98933" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-9f38-7fca-8dc4-85cc45b98933" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_019e83a7-9f38-7201-90d7-b6bebcbe8ede" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e83a7-9f38-741b-9a43-75ea1b686832" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_019e83a7-9f38-7201-90d7-b6bebcbe8ede" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e83a7-9f38-7439-af35-1a6a22789912" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e83a7-9f38-7439-af35-1a6a22789912" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a27-a6c0-bf7db66c883e" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e83a7-9f38-7439-af35-1a6a22789912" xlink:to="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a27-a6c0-bf7db66c883e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7a27-a6c0-bf7db66c883e_default" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a27-a6c0-bf7db66c883e" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7a27-a6c0-bf7db66c883e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-a0f7-79d6-9f99-5a8e7eb3bc3b" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a27-a6c0-bf7db66c883e" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-a0f7-79d6-9f99-5a8e7eb3bc3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019e83a7-a0f7-7af6-8b0a-875abd303334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-a0f7-79d6-9f99-5a8e7eb3bc3b" xlink:to="loc_us-gaap_TradeNamesMember_019e83a7-a0f7-7af6-8b0a-875abd303334" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LicenseAndFranchiseAgreementsMember_019e83a7-a0f7-725d-89e4-9f0736ff1d9f" xlink:href="fun-20260628.xsd#fun_LicenseAndFranchiseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-a0f7-79d6-9f99-5a8e7eb3bc3b" xlink:to="loc_fun_LicenseAndFranchiseAgreementsMember_019e83a7-a0f7-725d-89e4-9f0736ff1d9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7401-9329-d0be4d90d2e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e83a7-9f38-7439-af35-1a6a22789912" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7401-9329-d0be4d90d2e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7401-9329-d0be4d90d2e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7401-9329-d0be4d90d2e6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7401-9329-d0be4d90d2e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7af6-be39-1ba34b42d743" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7401-9329-d0be4d90d2e6" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7af6-be39-1ba34b42d743" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CaliforniasGreatAmericaMember_019e83a7-a0f7-774d-8824-df4bce815e1b" xlink:href="fun-20260628.xsd#fun_CaliforniasGreatAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7af6-be39-1ba34b42d743" xlink:to="loc_fun_CaliforniasGreatAmericaMember_019e83a7-a0f7-774d-8824-df4bce815e1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019e83a7-a0f7-7d87-a977-9dd9043f35f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e83a7-9f38-7439-af35-1a6a22789912" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019e83a7-a0f7-7d87-a977-9dd9043f35f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019e83a7-a0f7-7d87-a977-9dd9043f35f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019e83a7-a0f7-7d87-a977-9dd9043f35f2" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019e83a7-a0f7-7d87-a977-9dd9043f35f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019e83a7-a0f7-7a44-889a-d49728036c3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019e83a7-a0f7-7d87-a977-9dd9043f35f2" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019e83a7-a0f7-7a44-889a-d49728036c3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019e83a7-a0f7-7ecb-bc11-b2a99276e93b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019e83a7-a0f7-7a44-889a-d49728036c3c" xlink:to="loc_us-gaap_TradeNamesMember_019e83a7-a0f7-7ecb-bc11-b2a99276e93b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019e83a7-a0f7-7439-a9aa-48ce035d8ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_019e83a7-a0f7-7439-a9aa-48ce035d8ff3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e83a7-a0f7-7777-b14b-e2ca9282169f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e83a7-a0f7-7777-b14b-e2ca9282169f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019e83a7-a0f7-703a-b7ad-c469f8ff00e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019e83a7-a0f7-703a-b7ad-c469f8ff00e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019e83a7-a0f7-76c0-8f53-3e72eea9bfcc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e83a7-a0f7-7177-b62b-9f19ca5cb380" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019e83a7-a0f7-76c0-8f53-3e72eea9bfcc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#GoodwillandOtherIntangibleAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-70db-9f38-8bc7477354d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-77d8-a654-1f79c918751c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-70db-9f38-8bc7477354d2" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-77d8-a654-1f79c918751c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-77d8-a654-1f79c918751c" xlink:to="loc_us-gaap_ReportingUnitAxis_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf" xlink:to="loc_us-gaap_ReportingUnitDomain_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019e83a7-9f38-76f6-8c09-15e9f2f637ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_019e83a7-9f38-765c-b0ae-cf0d2e2e99bf" xlink:to="loc_us-gaap_ReportingUnitDomain_019e83a7-9f38-76f6-8c09-15e9f2f637ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsAndSchlitterbahnMember_019fbd6a-64dd-733b-bad8-1ed58d3cb5e7" xlink:href="fun-20260628.xsd#fun_SixFlagsAndSchlitterbahnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_019e83a7-9f38-76f6-8c09-15e9f2f637ae" xlink:to="loc_fun_SixFlagsAndSchlitterbahnMember_019fbd6a-64dd-733b-bad8-1ed58d3cb5e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsMember_019e83a7-9f38-7498-b260-0a26b456a7d5" xlink:href="fun-20260628.xsd#fun_SixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_SixFlagsAndSchlitterbahnMember_019fbd6a-64dd-733b-bad8-1ed58d3cb5e7" xlink:to="loc_fun_SixFlagsMember_019e83a7-9f38-7498-b260-0a26b456a7d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SchlitterbahnMember_019e83a7-9f38-71ab-9f85-85e69cab3976" xlink:href="fun-20260628.xsd#fun_SchlitterbahnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_SixFlagsAndSchlitterbahnMember_019fbd6a-64dd-733b-bad8-1ed58d3cb5e7" xlink:to="loc_fun_SchlitterbahnMember_019e83a7-9f38-71ab-9f85-85e69cab3976" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a33-b1b2-e618f4565021" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019e83a7-9f38-77d8-a654-1f79c918751c" xlink:to="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a33-b1b2-e618f4565021" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7a33-b1b2-e618f4565021_default" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a33-b1b2-e618f4565021" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7a33-b1b2-e618f4565021_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7e1e-9ec5-5c392fb2eae1" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019e83a7-9f38-7a33-b1b2-e618f4565021" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7e1e-9ec5-5c392fb2eae1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019e83a7-9f38-7eea-9435-a2e8ae07004b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7e1e-9ec5-5c392fb2eae1" xlink:to="loc_us-gaap_TradeNamesMember_019e83a7-9f38-7eea-9435-a2e8ae07004b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillMember_019fd233-c1f0-7b39-95ae-15e15d188244" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_IntangibleAssetsByMajorClassDomain_019e83a7-9f38-7e1e-9ec5-5c392fb2eae1" xlink:to="loc_us-gaap_GoodwillMember_019fd233-c1f0-7b39-95ae-15e15d188244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019e83a7-9f38-701c-9eec-6cc947953a6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-70db-9f38-8bc7477354d2" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019e83a7-9f38-701c-9eec-6cc947953a6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-9f38-7ba0-b81b-0620c407cabd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e83a7-9f38-70db-9f38-8bc7477354d2" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-9f38-7ba0-b81b-0620c407cabd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/LongTermDebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#LongTermDebtScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/LongTermDebtScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-778d-853b-5706b43c031a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-778d-853b-5706b43c031a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-778d-853b-5706b43c031a" xlink:to="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17" xlink:to="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-73df-afba-2c8232758ac5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-7b23-b3e8-fb3375d0ca17" xlink:to="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-73df-afba-2c8232758ac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e83a7-a0f7-742e-9cd3-ef48b1ea6985" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-73df-afba-2c8232758ac5" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e83a7-a0f7-742e-9cd3-ef48b1ea6985" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-732a-95e1-a99df1d6c615" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-778d-853b-5706b43c031a" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-732a-95e1-a99df1d6c615" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-732a-95e1-a99df1d6c615_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-732a-95e1-a99df1d6c615" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-732a-95e1-a99df1d6c615_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-732a-95e1-a99df1d6c615" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RevolvingCreditFacilityDue2028Member_019e83a7-a0f7-77db-bd0a-7e0cfc6c980e" xlink:href="fun-20260628.xsd#fun_RevolvingCreditFacilityDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_RevolvingCreditFacilityDue2028Member_019e83a7-a0f7-77db-bd0a-7e0cfc6c980e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2024CreditAgreementMember_019e83a7-a0f7-7365-af65-6eaa00f322b8" xlink:href="fun-20260628.xsd#fun_A2024CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2024CreditAgreementMember_019e83a7-a0f7-7365-af65-6eaa00f322b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-70ea-a123-c0ff38c3941f" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesat5.375Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-70ea-a123-c0ff38c3941f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-7a74-b320-440e1af067bd" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesAt5.500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-7a74-b320-440e1af067bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-7ae7-a8a4-c3ab9aa02a34" xlink:href="fun-20260628.xsd#fun_A2028SeniorNotesAt6500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-7ae7-a8a4-c3ab9aa02a34" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-7877-8fc5-f6afd3a1b88b" xlink:href="fun-20260628.xsd#fun_A2029SeniorNotesat5.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-7877-8fc5-f6afd3a1b88b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-7d01-8958-6466c44d7a6a" xlink:href="fun-20260628.xsd#fun_A2031SeniorNotesAt7.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-7d01-8958-6466c44d7a6a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-766a-8da5-6dbc04d4b00a" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt6.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-766a-8da5-6dbc04d4b00a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-74e0-8d11-30b0bd16373c" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt8.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-700f-a3c6-ecabb02a0f75" xlink:to="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-74e0-8d11-30b0bd16373c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7dc0-832c-837204266d88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-778d-853b-5706b43c031a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7dc0-832c-837204266d88" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7dc0-832c-837204266d88_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7dc0-832c-837204266d88" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7dc0-832c-837204266d88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7f89-a90f-72c2ac41fb90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7dc0-832c-837204266d88" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7f89-a90f-72c2ac41fb90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SeniorSecuredTermLoanMember_019e83a7-a0f7-7f10-84bb-88ab7803b848" xlink:href="fun-20260628.xsd#fun_SeniorSecuredTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7f89-a90f-72c2ac41fb90" xlink:to="loc_fun_SeniorSecuredTermLoanMember_019e83a7-a0f7-7f10-84bb-88ab7803b848" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019e83a7-a0f7-7bd3-8fa3-5b0f29c5eaff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7f89-a90f-72c2ac41fb90" xlink:to="loc_us-gaap_UnsecuredDebtMember_019e83a7-a0f7-7bd3-8fa3-5b0f29c5eaff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019e83a7-a0f7-7509-8c46-29882a2c6cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7f89-a90f-72c2ac41fb90" xlink:to="loc_us-gaap_SecuredDebtMember_019e83a7-a0f7-7509-8c46-29882a2c6cb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_019e83a7-a0f7-7132-b12a-8d809665bb2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_019e83a7-a0f7-7132-b12a-8d809665bb2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019e83a7-a0f7-7d4b-b5f4-7b54f570db0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019e83a7-a0f7-7d4b-b5f4-7b54f570db0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7406-be8e-fd27515cb164" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7406-be8e-fd27515cb164" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019e83a7-a0f7-7db7-a491-8501a8373b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019e83a7-a0f7-7db7-a491-8501a8373b2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LongTermDebtGrossCurrentMaturities_019e83a7-a0f7-7fb4-9425-85ca8f8fd9ec" xlink:href="fun-20260628.xsd#fun_LongTermDebtGrossCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_fun_LongTermDebtGrossCurrentMaturities_019e83a7-a0f7-7fb4-9425-85ca8f8fd9ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LongTermDebtGrossExcludingCurrentMaturities_019e83a7-a0f7-7e0d-b4e6-e685dedc1dd6" xlink:href="fun-20260628.xsd#fun_LongTermDebtGrossExcludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_fun_LongTermDebtGrossExcludingCurrentMaturities_019e83a7-a0f7-7e0d-b4e6-e685dedc1dd6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e83a7-a0f7-7873-accd-6fcd467116ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e83a7-a0f7-7873-accd-6fcd467116ef" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentBusinessCombinationFairValueLayers_019e83a7-a0f7-772e-917d-a1f53f196810" xlink:href="fun-20260628.xsd#fun_DebtInstrumentBusinessCombinationFairValueLayers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_fun_DebtInstrumentBusinessCombinationFairValueLayers_019e83a7-a0f7-772e-917d-a1f53f196810" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e83a7-a0f7-7298-a945-558d6352e1c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-7503-8621-7ab8ec9d52e9" xlink:to="loc_us-gaap_LongTermDebt_019e83a7-a0f7-7298-a945-558d6352e1c9" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#LongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/LongTermDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7d2d-bac1-32594ee05e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7d2d-bac1-32594ee05e3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7d2d-bac1-32594ee05e3d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7d2d-bac1-32594ee05e3d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7d2d-bac1-32594ee05e3d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7d2d-bac1-32594ee05e3d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2024CreditAgreementMember_019e83a7-a0f7-759e-afa7-d73ad059287f" xlink:href="fun-20260628.xsd#fun_A2024CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2024CreditAgreementMember_019e83a7-a0f7-759e-afa7-d73ad059287f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2025SeniorNotesAt7.000Member_019e83a7-a0f7-7ce3-85ec-28293a167998" xlink:href="fun-20260628.xsd#fun_A2025SeniorNotesAt7.000Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2025SeniorNotesAt7.000Member_019e83a7-a0f7-7ce3-85ec-28293a167998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_019e83a7-a0f7-7055-b801-d09aee8c5531" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StandbyLettersOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_019e83a7-a0f7-7055-b801-d09aee8c5531" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-73d4-8172-d0839faaa41d" xlink:href="fun-20260628.xsd#fun_A2029SeniorNotesat5.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-73d4-8172-d0839faaa41d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-786e-a7b6-0e226366911f" xlink:href="fun-20260628.xsd#fun_A2028SeniorNotesAt6500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-786e-a7b6-0e226366911f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-748b-ac65-ddfb55b24e2c" xlink:href="fun-20260628.xsd#fun_A2031SeniorNotesAt7.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-748b-ac65-ddfb55b24e2c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-7851-a830-8ea3210f5ecb" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt6.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-7851-a830-8ea3210f5ecb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-71fa-953e-875de7960cad" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt8.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-71fa-953e-875de7960cad" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-74fc-99a0-3c21ddd888dc" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesat5.375Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-74fc-99a0-3c21ddd888dc" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-7252-80a1-d8fe3f888a0b" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesAt5.500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-77aa-a880-3a2cb8068397" xlink:to="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-7252-80a1-d8fe3f888a0b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7c8e-92a8-62a00133756b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e83a7-a0f7-7ae6-b8c3-2f5623ace11b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7c8e-92a8-62a00133756b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SeniorSecuredTermLoanMember_019e83a7-a0f7-79ca-88e7-470900f34da3" xlink:href="fun-20260628.xsd#fun_SeniorSecuredTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7c8e-92a8-62a00133756b" xlink:to="loc_fun_SeniorSecuredTermLoanMember_019e83a7-a0f7-79ca-88e7-470900f34da3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019e83a7-a0f7-7660-8032-2e915ddd1de8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7c8e-92a8-62a00133756b" xlink:to="loc_us-gaap_SecuredDebtMember_019e83a7-a0f7-7660-8032-2e915ddd1de8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019e83a7-a0f7-7c28-b79e-a000e8fe7165" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e83a7-a0f7-7c8e-92a8-62a00133756b" xlink:to="loc_us-gaap_UnsecuredDebtMember_019e83a7-a0f7-7c28-b79e-a000e8fe7165" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-733c-9ed0-37796bbc0d50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:to="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-733c-9ed0-37796bbc0d50" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-733c-9ed0-37796bbc0d50_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-733c-9ed0-37796bbc0d50" xlink:to="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-733c-9ed0-37796bbc0d50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-7a19-b5db-a861380a464c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e83a7-a0f7-733c-9ed0-37796bbc0d50" xlink:to="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-7a19-b5db-a861380a464c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e83a7-a0f7-70d3-95c7-cb86ead1bf01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e83a7-a0f7-7a19-b5db-a861380a464c" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e83a7-a0f7-70d3-95c7-cb86ead1bf01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019e83a7-a0f7-7b41-921a-6cb6ac477044" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:to="loc_us-gaap_VariableRateAxis_019e83a7-a0f7-7b41-921a-6cb6ac477044" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-7b41-921a-6cb6ac477044_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019e83a7-a0f7-7b41-921a-6cb6ac477044" xlink:to="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-7b41-921a-6cb6ac477044_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019e83a7-a0f7-7b41-921a-6cb6ac477044" xlink:to="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e83a7-a0f7-7b19-b85f-b66dca3e50c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e83a7-a0f7-7b19-b85f-b66dca3e50c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019e83a7-a0f7-7ee7-b883-630aa9fb90e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:to="loc_us-gaap_BaseRateMember_019e83a7-a0f7-7ee7-b883-630aa9fb90e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CanadianOvernightRepoRateAverageMember_019e83a7-a0f7-7432-af98-2c98733106bb" xlink:href="fun-20260628.xsd#fun_CanadianOvernightRepoRateAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:to="loc_fun_CanadianOvernightRepoRateAverageMember_019e83a7-a0f7-7432-af98-2c98733106bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CanadianPrimeRateMember_019e83a7-a0f7-7e0e-9f79-00db1d990ef4" xlink:href="fun-20260628.xsd#fun_CanadianPrimeRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e83a7-a0f7-783e-8634-ec78b1f902f7" xlink:to="loc_fun_CanadianPrimeRateMember_019e83a7-a0f7-7e0e-9f79-00db1d990ef4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019e83a7-a0f7-7f95-a605-0067aafa60c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e83a7-a0f7-7258-82f7-4241fc4c01ba" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019e83a7-a0f7-7f95-a605-0067aafa60c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-7f95-a605-0067aafa60c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019e83a7-a0f7-7f95-a605-0067aafa60c9" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-7f95-a605-0067aafa60c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019e83a7-a0f7-7f95-a605-0067aafa60c9" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019e83a7-a0f7-760e-a808-3b75ba53aefb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019e83a7-a0f7-760e-a808-3b75ba53aefb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019e83a7-a0f7-79a5-a3d0-1ba5d7b97eb1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019e83a7-a0f7-79a5-a3d0-1ba5d7b97eb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RestrictedPaymentsMember_019e83a7-a0f7-72a4-9b23-a83071b1c266" xlink:href="fun-20260628.xsd#fun_RestrictedPaymentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:to="loc_fun_RestrictedPaymentsMember_019e83a7-a0f7-72a4-9b23-a83071b1c266" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RestrictedPaymentsAsAmendedMember_019e83a7-a0f7-7f61-b3fe-2aaa8294b87b" xlink:href="fun-20260628.xsd#fun_RestrictedPaymentsAsAmendedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019e83a7-a0f7-749b-b4c3-df4ee00822be" xlink:to="loc_fun_RestrictedPaymentsAsAmendedMember_019e83a7-a0f7-7f61-b3fe-2aaa8294b87b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e83a7-a0f7-7ee3-b0f1-2beec9b5f794" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e83a7-a0f7-7ee3-b0f1-2beec9b5f794" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentAdditionToFaceAmount_019e83a7-a0f7-7b24-b481-718a69b2cac8" xlink:href="fun-20260628.xsd#fun_DebtInstrumentAdditionToFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentAdditionToFaceAmount_019e83a7-a0f7-7b24-b481-718a69b2cac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e83a7-a0f7-7325-af2a-49af4b1d71f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e83a7-a0f7-7325-af2a-49af4b1d71f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7b95-af45-e32ce9593be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7b95-af45-e32ce9593be4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_019e83a7-a0f7-72b2-93d2-93591ef13fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_019e83a7-a0f7-72b2-93d2-93591ef13fc8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e83a7-a0f7-729b-8015-0691e9b0afb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e83a7-a0f7-729b-8015-0691e9b0afb7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentSubjectToMaturityDateSpringingTerm_019e83a7-a0f7-7a06-bb48-ae6343e2cade" xlink:href="fun-20260628.xsd#fun_DebtInstrumentSubjectToMaturityDateSpringingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentSubjectToMaturityDateSpringingTerm_019e83a7-a0f7-7a06-bb48-ae6343e2cade" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019e83a7-a0f7-7e07-a262-86268f2a3fe4" xlink:href="fun-20260628.xsd#fun_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019e83a7-a0f7-7e07-a262-86268f2a3fe4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e83a7-a0f7-7803-8494-9f0fd4f61c53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e83a7-a0f7-7803-8494-9f0fd4f61c53" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019e83a7-a0f7-72f1-be8c-181a6d471bd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019e83a7-a0f7-72f1-be8c-181a6d471bd5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PercentageOfDecreaseInUnusedPortionOfCreditFacilities_019e83a7-a0f7-7bd4-8d56-4669bce6983c" xlink:href="fun-20260628.xsd#fun_PercentageOfDecreaseInUnusedPortionOfCreditFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_PercentageOfDecreaseInUnusedPortionOfCreditFacilities_019e83a7-a0f7-7bd4-8d56-4669bce6983c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentLeverageRatioFirst_019e83a7-a0f7-7ffb-8503-7dd2a9ce0c7d" xlink:href="fun-20260628.xsd#fun_DebtInstrumentLeverageRatioFirst"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentLeverageRatioFirst_019e83a7-a0f7-7ffb-8503-7dd2a9ce0c7d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e83a7-a0f7-7d30-8be2-40804a4702b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_LineOfCredit_019e83a7-a0f7-7d30-8be2-40804a4702b2" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019e83a7-a0f7-7810-a13c-dd1a4a70a13c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019e83a7-a0f7-7810-a13c-dd1a4a70a13c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019e83a7-a0f7-76c4-a717-b9fbf62288d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019e83a7-a0f7-76c4-a717-b9fbf62288d0" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019e83a7-a0f7-7505-9769-27e4edfe51e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019e83a7-a0f7-7505-9769-27e4edfe51e9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019e83a7-a0f7-7f0d-95cf-5483b00ba498" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019e83a7-a0f7-7f0d-95cf-5483b00ba498" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentRedemptionPricePercentageOutstandingMinimum_019e83a7-a0f7-7227-9613-a9183439eb77" xlink:href="fun-20260628.xsd#fun_DebtInstrumentRedemptionPricePercentageOutstandingMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentRedemptionPricePercentageOutstandingMinimum_019e83a7-a0f7-7227-9613-a9183439eb77" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentRedemptionPeriod_019e83a7-a0f7-7435-8f5b-561b2309214e" xlink:href="fun-20260628.xsd#fun_DebtInstrumentRedemptionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentRedemptionPeriod_019e83a7-a0f7-7435-8f5b-561b2309214e" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-a0f7-722d-904b-390100be9ecb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-a0f7-722d-904b-390100be9ecb" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentLeverageRatioConsolidatedMaximum_019e83a7-a0f7-7f84-a6d1-140ad1e30903" xlink:href="fun-20260628.xsd#fun_DebtInstrumentLeverageRatioConsolidatedMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentLeverageRatioConsolidatedMaximum_019e83a7-a0f7-7f84-a6d1-140ad1e30903" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentCovenantLeverageRatioStepDownOfOriginalFaceAmount_019e83a7-a0f7-7ed3-9c7f-591e7469f644" xlink:href="fun-20260628.xsd#fun_DebtInstrumentCovenantLeverageRatioStepDownOfOriginalFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentCovenantLeverageRatioStepDownOfOriginalFaceAmount_019e83a7-a0f7-7ed3-9c7f-591e7469f644" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_TotalIndebtednessToConsolidatedCashFlowRatioRequirement_019e83a7-a0f7-72fc-95a1-ecf95cd75514" xlink:href="fun-20260628.xsd#fun_TotalIndebtednessToConsolidatedCashFlowRatioRequirement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_TotalIndebtednessToConsolidatedCashFlowRatioRequirement_019e83a7-a0f7-72fc-95a1-ecf95cd75514" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentProformaNetSecuredLeverageRatio_019e83a7-a0f7-7a97-ac9a-85ab9637f2e3" xlink:href="fun-20260628.xsd#fun_DebtInstrumentProformaNetSecuredLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentProformaNetSecuredLeverageRatio_019e83a7-a0f7-7a97-ac9a-85ab9637f2e3" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentRestrictedPaymentPercentage_019e83a7-a0f7-74bb-89d5-37f23bbdb231" xlink:href="fun-20260628.xsd#fun_DebtInstrumentRestrictedPaymentPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentRestrictedPaymentPercentage_019e83a7-a0f7-74bb-89d5-37f23bbdb231" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentRestrictedPaymentAmount_019e83a7-a0f7-721b-bc8e-10f7015bd4a1" xlink:href="fun-20260628.xsd#fun_DebtInstrumentRestrictedPaymentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e83a7-a0f7-76f0-ae6f-f443a27da21e" xlink:to="loc_fun_DebtInstrumentRestrictedPaymentAmount_019e83a7-a0f7-721b-bc8e-10f7015bd4a1" xlink:type="arc" order="25"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/NonControllingInterestsNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#NonControllingInterestsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/NonControllingInterestsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-7fe7-a445-664cf3655ac3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-7fe7-a445-664cf3655ac3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7fad-bef4-eb6ba80029e1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-7fe7-a445-664cf3655ac3" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7fad-bef4-eb6ba80029e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7fad-bef4-eb6ba80029e1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7fad-bef4-eb6ba80029e1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7fad-bef4-eb6ba80029e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7ef4-8cf4-7cf84be53229" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7fad-bef4-eb6ba80029e1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7ef4-8cf4-7cf84be53229" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember_019e83a7-a0f7-71a2-b79b-605577d8133c" xlink:href="fun-20260628.xsd#fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7ef4-8cf4-7cf84be53229" xlink:to="loc_fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember_019e83a7-a0f7-71a2-b79b-605577d8133c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SubsidiariesSixFlagsOverTexasMember_019e83a7-a0f7-7a8c-bef1-779191949f45" xlink:href="fun-20260628.xsd#fun_SubsidiariesSixFlagsOverTexasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember_019e83a7-a0f7-71a2-b79b-605577d8133c" xlink:to="loc_fun_SubsidiariesSixFlagsOverTexasMember_019e83a7-a0f7-7a8c-bef1-779191949f45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SubsidiariesSixFlagsOverGeorgiaMember_019e83a7-a0f7-78d5-a36e-204ed2106aa3" xlink:href="fun-20260628.xsd#fun_SubsidiariesSixFlagsOverGeorgiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_SubsidiariesSixFlagsOverTexasAndGeorgiaMember_019e83a7-a0f7-71a2-b79b-605577d8133c" xlink:to="loc_fun_SubsidiariesSixFlagsOverGeorgiaMember_019e83a7-a0f7-78d5-a36e-204ed2106aa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019e83a7-a0f7-77e9-9fa9-34f9383c20be" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-7fe7-a445-664cf3655ac3" xlink:to="loc_srt_OwnershipAxis_019e83a7-a0f7-77e9-9fa9-34f9383c20be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e83a7-a0f7-77e9-9fa9-34f9383c20be_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019e83a7-a0f7-77e9-9fa9-34f9383c20be" xlink:to="loc_srt_OwnershipDomain_019e83a7-a0f7-77e9-9fa9-34f9383c20be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e83a7-a0f7-7f41-b81d-05a2134c5e1e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019e83a7-a0f7-77e9-9fa9-34f9383c20be" xlink:to="loc_srt_OwnershipDomain_019e83a7-a0f7-7f41-b81d-05a2134c5e1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsOverGeorgiaMember_019e83a7-a0f7-73ae-91b8-1a213d4007a7" xlink:href="fun-20260628.xsd#fun_SixFlagsOverGeorgiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e83a7-a0f7-7f41-b81d-05a2134c5e1e" xlink:to="loc_fun_SixFlagsOverGeorgiaMember_019e83a7-a0f7-73ae-91b8-1a213d4007a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsOverTexasMember_019e83a7-a0f7-71d2-859d-6f772a7d0ab9" xlink:href="fun-20260628.xsd#fun_SixFlagsOverTexasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e83a7-a0f7-7f41-b81d-05a2134c5e1e" xlink:to="loc_fun_SixFlagsOverTexasMember_019e83a7-a0f7-71d2-859d-6f772a7d0ab9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019e83a7-a0f7-79ed-a19e-50cff230261e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-7fe7-a445-664cf3655ac3" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019e83a7-a0f7-79ed-a19e-50cff230261e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019e83a7-a0f7-79ed-a19e-50cff230261e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019e83a7-a0f7-79ed-a19e-50cff230261e" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019e83a7-a0f7-79ed-a19e-50cff230261e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019e83a7-a0f7-7516-b6d5-78322b6212e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019e83a7-a0f7-79ed-a19e-50cff230261e" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019e83a7-a0f7-7516-b6d5-78322b6212e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_019e83a7-a0f7-7b3b-9a25-20740268c9c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019e83a7-a0f7-7516-b6d5-78322b6212e2" xlink:to="loc_us-gaap_LimitedPartnerMember_019e83a7-a0f7-7b3b-9a25-20740268c9c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LossContingencyAnnualDistributions_019e83a7-a0f7-76fd-a40d-df8541a6f5ff" xlink:href="fun-20260628.xsd#fun_LossContingencyAnnualDistributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_LossContingencyAnnualDistributions_019e83a7-a0f7-76fd-a40d-df8541a6f5ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LossContingencyShareInAnnualDistributions_019e83a7-a0f7-72bd-b4d6-3f25dc2168fa" xlink:href="fun-20260628.xsd#fun_LossContingencyShareInAnnualDistributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_LossContingencyShareInAnnualDistributions_019e83a7-a0f7-72bd-b4d6-3f25dc2168fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_LossContingencyRollingPeriodForMinimumCapitalExpenditures_019e83a7-a0f7-709a-8e45-373f0368428f" xlink:href="fun-20260628.xsd#fun_LossContingencyRollingPeriodForMinimumCapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_LossContingencyRollingPeriodForMinimumCapitalExpenditures_019e83a7-a0f7-709a-8e45-373f0368428f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CapitalExpenditureAsPercentageOfPartnershipParksRevenue_019e83a7-a0f7-7ae5-8f4d-031b5c13e1ce" xlink:href="fun-20260628.xsd#fun_CapitalExpenditureAsPercentageOfPartnershipParksRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_CapitalExpenditureAsPercentageOfPartnershipParksRevenue_019e83a7-a0f7-7ae5-8f4d-031b5c13e1ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountUnitsAcquisitions_019e83a7-a0f7-783a-af51-dee98952dfe9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PartnersCapitalAccountUnitsAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_PartnersCapitalAccountUnitsAcquisitions_019e83a7-a0f7-783a-af51-dee98952dfe9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountAcquisitions_019e83a7-a0f7-704c-a265-553da6e97346" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PartnersCapitalAccountAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_PartnersCapitalAccountAcquisitions_019e83a7-a0f7-704c-a265-553da6e97346" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PurchasePriceValuationPeriodOfPartnershipParkWeightedAverageEarningsBeforeInterestTaxDepreciationAndAmortization_019e83a7-a0f7-751c-914c-973bddca95d2" xlink:href="fun-20260628.xsd#fun_PurchasePriceValuationPeriodOfPartnershipParkWeightedAverageEarningsBeforeInterestTaxDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_PurchasePriceValuationPeriodOfPartnershipParkWeightedAverageEarningsBeforeInterestTaxDepreciationAndAmortization_019e83a7-a0f7-751c-914c-973bddca95d2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PurchasePriceValuationSpecifiedMultiplier_019e83a7-a0f7-77db-bf6f-e231ddd1b678" xlink:href="fun-20260628.xsd#fun_PurchasePriceValuationSpecifiedMultiplier"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_PurchasePriceValuationSpecifiedMultiplier_019e83a7-a0f7-77db-bf6f-e231ddd1b678" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PurchasePriceValuationThresholdPrice_019e83a7-a0f7-7137-bb1f-e13a774ceac7" xlink:href="fun-20260628.xsd#fun_PurchasePriceValuationThresholdPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_PurchasePriceValuationThresholdPrice_019e83a7-a0f7-7137-bb1f-e13a774ceac7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_019e83a7-a0f7-7f8e-b115-2a3da7a5de7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_019e83a7-a0f7-7f8e-b115-2a3da7a5de7b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RedeemableNoncontrollingInterestEquityAgreedUponValue_019e83a7-a0f7-7734-8865-24ad8fee78f0" xlink:href="fun-20260628.xsd#fun_RedeemableNoncontrollingInterestEquityAgreedUponValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_RedeemableNoncontrollingInterestEquityAgreedUponValue_019e83a7-a0f7-7734-8865-24ad8fee78f0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_019e83a7-a0f7-7f2c-a125-dd9b06405dd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_019e83a7-a0f7-7f2c-a125-dd9b06405dd2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementAndServiceFeesRate_019e83a7-a0f7-792f-93c7-104c85cc904d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ManagementAndServiceFeesRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_ManagementAndServiceFeesRate_019e83a7-a0f7-792f-93c7-104c85cc904d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PartnershipParksCashDistributionPercentageAfterManagementFee_019e83a7-a0f7-77c7-8199-e41b4f730789" xlink:href="fun-20260628.xsd#fun_PartnershipParksCashDistributionPercentageAfterManagementFee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_PartnershipParksCashDistributionPercentageAfterManagementFee_019e83a7-a0f7-77c7-8199-e41b4f730789" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PartnershipParksNetCashProvidedByUsedInOperatingActivitiesContinuingOperations_019e83a7-a0f7-7d07-83e9-e145abbc3651" xlink:href="fun-20260628.xsd#fun_PartnershipParksNetCashProvidedByUsedInOperatingActivitiesContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_PartnershipParksNetCashProvidedByUsedInOperatingActivitiesContinuingOperations_019e83a7-a0f7-7d07-83e9-e145abbc3651" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-a0f7-78ff-965f-d324d85ba8d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-a0f7-78ff-965f-d324d85ba8d6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_AccruedMinimumDistributionPayment_019f8dce-eb12-764c-abf9-198610869ee6" xlink:href="fun-20260628.xsd#fun_AccruedMinimumDistributionPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7e6c-a751-aa27719e0ea8" xlink:to="loc_fun_AccruedMinimumDistributionPayment_019f8dce-eb12-764c-abf9-198610869ee6" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/NonControllingInterestsScheduleofChangesinCarryingValueofRedeemableNoncontrollingInterestDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#NonControllingInterestsScheduleofChangesinCarryingValueofRedeemableNoncontrollingInterestDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/NonControllingInterestsScheduleofChangesinCarryingValueofRedeemableNoncontrollingInterestDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7f10-a681-ccd2f04dbae9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-75cc-8ab4-5d8356efea4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7f10-a681-ccd2f04dbae9" xlink:to="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-75cc-8ab4-5d8356efea4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7c5b-9688-d670c4f8f895" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019e83a7-a0f7-75cc-8ab4-5d8356efea4e" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7c5b-9688-d670c4f8f895" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7c5b-9688-d670c4f8f895_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7c5b-9688-d670c4f8f895" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-7c5b-9688-d670c4f8f895_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-763b-9dac-d64fa204ef6e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e83a7-a0f7-7c5b-9688-d670c4f8f895" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-763b-9dac-d64fa204ef6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SubsidiariesSixFlagsOverGeorgiaMember_019e83a7-a0f7-7b07-9553-923c2c01f28d" xlink:href="fun-20260628.xsd#fun_SubsidiariesSixFlagsOverGeorgiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-763b-9dac-d64fa204ef6e" xlink:to="loc_fun_SubsidiariesSixFlagsOverGeorgiaMember_019e83a7-a0f7-7b07-9553-923c2c01f28d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SubsidiariesSixFlagsOverTexasMember_019eb6f3-3808-7adc-a2b1-0c5662ac7a22" xlink:href="fun-20260628.xsd#fun_SubsidiariesSixFlagsOverTexasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e83a7-a0f7-763b-9dac-d64fa204ef6e" xlink:to="loc_fun_SubsidiariesSixFlagsOverTexasMember_019eb6f3-3808-7adc-a2b1-0c5662ac7a22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MovementInMinorityInterestRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019e83a7-a0f7-7f10-a681-ccd2f04dbae9" xlink:to="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e83a7-a0f7-7454-b0ea-f7d6ebd10aa6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e83a7-a0f7-7454-b0ea-f7d6ebd10aa6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RedeemableNoncontrollingInterestPurchaseOfRedeemableUnits_019eb6f1-971c-772f-848b-fbe5d437c6e1" xlink:href="fun-20260628.xsd#fun_RedeemableNoncontrollingInterestPurchaseOfRedeemableUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_fun_RedeemableNoncontrollingInterestPurchaseOfRedeemableUnits_019eb6f1-971c-772f-848b-fbe5d437c6e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RedeemableNoncontrollingInterestLiabilityGainLossOnPurchase_019eb6f1-971c-7f73-aae1-531904a1325b" xlink:href="fun-20260628.xsd#fun_RedeemableNoncontrollingInterestLiabilityGainLossOnPurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_fun_RedeemableNoncontrollingInterestLiabilityGainLossOnPurchase_019eb6f1-971c-7f73-aae1-531904a1325b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_RedeemableNoncontrollingInterestInterestAccretion_019e83a7-a0f7-7b19-8d01-aa35debf2987" xlink:href="fun-20260628.xsd#fun_RedeemableNoncontrollingInterestInterestAccretion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_fun_RedeemableNoncontrollingInterestInterestAccretion_019e83a7-a0f7-7b19-8d01-aa35debf2987" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019eb6f3-3808-71dc-84b3-cae7e9d866df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019eb6f3-3808-71dc-84b3-cae7e9d866df" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019eb6f3-3808-74c4-b6b3-ac789f0f091e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019e83a7-a0f7-78c6-867b-ac9e62ea2fd0" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019eb6f3-3808-74c4-b6b3-ac789f0f091e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019e83a7-a0f7-7bc1-9297-14e3b9878ed1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/EarningsperShareNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#EarningsperShareNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/EarningsperShareNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e83a7-a0f7-7130-95d4-6b8f0e63a528" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e83a7-a0f7-746c-9463-ddbfaf856932" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e83a7-a0f7-7130-95d4-6b8f0e63a528" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e83a7-a0f7-746c-9463-ddbfaf856932" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e83a7-a0f7-7db0-9884-7236419d56b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e83a7-a0f7-746c-9463-ddbfaf856932" xlink:to="loc_us-gaap_AwardTypeAxis_019e83a7-a0f7-7db0-9884-7236419d56b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-7db0-9884-7236419d56b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e83a7-a0f7-7db0-9884-7236419d56b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-7db0-9884-7236419d56b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e83a7-a0f7-7db0-9884-7236419d56b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e83a7-a0f7-7e5c-9b55-e51a5513f108" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:to="loc_us-gaap_PerformanceSharesMember_019e83a7-a0f7-7e5c-9b55-e51a5513f108" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PerformanceUnitsTargetOneMember_019e83a7-a0f7-7c7e-b9b6-7cbd0edbfe97" xlink:href="fun-20260628.xsd#fun_PerformanceUnitsTargetOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PerformanceSharesMember_019e83a7-a0f7-7e5c-9b55-e51a5513f108" xlink:to="loc_fun_PerformanceUnitsTargetOneMember_019e83a7-a0f7-7c7e-b9b6-7cbd0edbfe97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_PerformanceUnitsTargetTwoMember_019e83a7-a0f7-76c5-8c91-36c606e73551" xlink:href="fun-20260628.xsd#fun_PerformanceUnitsTargetTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PerformanceSharesMember_019e83a7-a0f7-7e5c-9b55-e51a5513f108" xlink:to="loc_fun_PerformanceUnitsTargetTwoMember_019e83a7-a0f7-76c5-8c91-36c606e73551" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019e83a7-a0f7-7503-bdff-4eed8e0029b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019e83a7-a0f7-7503-bdff-4eed8e0029b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e83a7-a0f7-7f97-9a1f-8bfb4084b6f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e83a7-a0f7-7f97-9a1f-8bfb4084b6f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DeferredStockUnitsMember_019e83a7-a0f7-71e3-9d86-1b37858d285a" xlink:href="fun-20260628.xsd#fun_DeferredStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e83a7-a0f7-72bb-bf88-cf1c7afa92a1" xlink:to="loc_fun_DeferredStockUnitsMember_019e83a7-a0f7-71e3-9d86-1b37858d285a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e83a7-a0f7-75f2-9569-987988eade29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e83a7-a0f7-746c-9463-ddbfaf856932" xlink:to="loc_us-gaap_PlanNameAxis_019e83a7-a0f7-75f2-9569-987988eade29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e83a7-a0f7-75f2-9569-987988eade29_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e83a7-a0f7-75f2-9569-987988eade29" xlink:to="loc_us-gaap_PlanNameDomain_019e83a7-a0f7-75f2-9569-987988eade29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e83a7-a0f7-7a03-8543-7bde9af51e29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e83a7-a0f7-75f2-9569-987988eade29" xlink:to="loc_us-gaap_PlanNameDomain_019e83a7-a0f7-7a03-8543-7bde9af51e29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2024OmnibusIncentivePlanMember_019e83a7-a0f7-74ea-bdaa-220a5494ffb9" xlink:href="fun-20260628.xsd#fun_A2024OmnibusIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e83a7-a0f7-7a03-8543-7bde9af51e29" xlink:to="loc_fun_A2024OmnibusIncentivePlanMember_019e83a7-a0f7-74ea-bdaa-220a5494ffb9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e83a7-a0f7-7418-9595-bdc4d1a42c96" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e83a7-a0f7-746c-9463-ddbfaf856932" xlink:to="loc_srt_RangeAxis_019e83a7-a0f7-7418-9595-bdc4d1a42c96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e83a7-a0f7-7418-9595-bdc4d1a42c96_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e83a7-a0f7-7418-9595-bdc4d1a42c96" xlink:to="loc_srt_RangeMember_019e83a7-a0f7-7418-9595-bdc4d1a42c96_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e83a7-a0f7-727d-bb12-28ab49d3ecc2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e83a7-a0f7-7418-9595-bdc4d1a42c96" xlink:to="loc_srt_RangeMember_019e83a7-a0f7-727d-bb12-28ab49d3ecc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e83a7-a0f7-773e-8b59-6db047cc57c9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e83a7-a0f7-727d-bb12-28ab49d3ecc2" xlink:to="loc_srt_MaximumMember_019e83a7-a0f7-773e-8b59-6db047cc57c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e83a7-a0f7-76ad-ad92-b1c2ec21fd5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e83a7-a0f7-7130-95d4-6b8f0e63a528" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e83a7-a0f7-76ad-ad92-b1c2ec21fd5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetAwardsEligibleToReceivePercentage_019e83a7-a0f7-709a-bcde-5d2ad6de2ce6" xlink:href="fun-20260628.xsd#fun_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetAwardsEligibleToReceivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e83a7-a0f7-7130-95d4-6b8f0e63a528" xlink:to="loc_fun_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetAwardsEligibleToReceivePercentage_019e83a7-a0f7-709a-bcde-5d2ad6de2ce6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/FairValueMeasurementsScheduleofAssetsandLiabilitiesMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7f0e-85a9-14022aef1667" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7f0e-85a9-14022aef1667" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e83a7-a0f7-7f80-82fa-7f76881a5bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7f0e-85a9-14022aef1667" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e83a7-a0f7-7f80-82fa-7f76881a5bf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f80-82fa-7f76881a5bf3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e83a7-a0f7-7f80-82fa-7f76881a5bf3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f80-82fa-7f76881a5bf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f02-a37c-447ee83c5433" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e83a7-a0f7-7f80-82fa-7f76881a5bf3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f02-a37c-447ee83c5433" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e83a7-a0f7-735d-8e86-4a9af44ef0a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f02-a37c-447ee83c5433" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e83a7-a0f7-735d-8e86-4a9af44ef0a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e83a7-a0f7-7cdd-9476-39ee2e867189" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e83a7-a0f7-7f02-a37c-447ee83c5433" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e83a7-a0f7-7cdd-9476-39ee2e867189" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e83a7-a0f7-7d7c-9fde-2652adb63c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7f0e-85a9-14022aef1667" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e83a7-a0f7-7d7c-9fde-2652adb63c7a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e83a7-a0f7-7d7c-9fde-2652adb63c7a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e83a7-a0f7-7d7c-9fde-2652adb63c7a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e83a7-a0f7-7d7c-9fde-2652adb63c7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e83a7-a0f7-7932-9882-cb0f409f649f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e83a7-a0f7-7d7c-9fde-2652adb63c7a" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e83a7-a0f7-7932-9882-cb0f409f649f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e83a7-a0f7-78a3-ade2-4ade7c608e92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e83a7-a0f7-7932-9882-cb0f409f649f" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e83a7-a0f7-78a3-ade2-4ade7c608e92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e83a7-a0f7-726e-8bb7-f9b6c982eb5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e83a7-a0f7-78a3-ade2-4ade7c608e92" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e83a7-a0f7-726e-8bb7-f9b6c982eb5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7884-80f4-e8de9bce5642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7f0e-85a9-14022aef1667" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7884-80f4-e8de9bce5642" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7884-80f4-e8de9bce5642_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7884-80f4-e8de9bce5642" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7884-80f4-e8de9bce5642_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e83a7-a0f7-7884-80f4-e8de9bce5642" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2017CreditAgreementMember_019e83a7-a0f7-7eab-a266-e0ef34691b4c" xlink:href="fun-20260628.xsd#fun_A2017CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2017CreditAgreementMember_019e83a7-a0f7-7eab-a266-e0ef34691b4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-7067-aacd-c80de8285926" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesat5.375Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2027SeniorNotesat5.375Member_019e83a7-a0f7-7067-aacd-c80de8285926" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-72d1-b6ea-152e3cec9b5b" xlink:href="fun-20260628.xsd#fun_A2027SeniorNotesAt5.500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2027SeniorNotesAt5.500Member_019e83a7-a0f7-72d1-b6ea-152e3cec9b5b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-781e-9172-da908e6a04ad" xlink:href="fun-20260628.xsd#fun_A2028SeniorNotesAt6500Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2028SeniorNotesAt6500Member_019e83a7-a0f7-781e-9172-da908e6a04ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-7242-8dda-68ee01ed8beb" xlink:href="fun-20260628.xsd#fun_A2029SeniorNotesat5.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2029SeniorNotesat5.250Member_019e83a7-a0f7-7242-8dda-68ee01ed8beb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-77d5-9dfe-f3ba6778c7bd" xlink:href="fun-20260628.xsd#fun_A2031SeniorNotesAt7.250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2031SeniorNotesAt7.250Member_019e83a7-a0f7-77d5-9dfe-f3ba6778c7bd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-7c8c-87bf-5ed83b1e374f" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt6.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2032SeniorNotesAt6.625Member_019e83a7-a0f7-7c8c-87bf-5ed83b1e374f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-704c-982d-46cb56543af5" xlink:href="fun-20260628.xsd#fun_A2032SeniorNotesAt8.625Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e83a7-a0f7-7e1a-baaf-10e831d58a72" xlink:to="loc_fun_A2032SeniorNotesAt8.625Member_019e83a7-a0f7-704c-982d-46cb56543af5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_ShortTermInvestmentsFairValueDisclosure_019e83a7-a0f7-7b77-b9fb-296dafc6ab65" xlink:href="fun-20260628.xsd#fun_ShortTermInvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_fun_ShortTermInvestmentsFairValueDisclosure_019e83a7-a0f7-7b77-b9fb-296dafc6ab65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e83a7-a0f7-7b56-bb43-9a4cb2d0924e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e83a7-a0f7-7b56-bb43-9a4cb2d0924e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7568-9fa2-796df939a27d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e83a7-a0f7-7568-9fa2-796df939a27d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_019e83a7-a0f7-7207-8256-766b61d83bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_NotesPayableFairValueDisclosure_019e83a7-a0f7-7207-8256-766b61d83bd0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019e83a7-a0f7-7f15-a0b6-223f45df41d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_LongTermDebtCurrent_019e83a7-a0f7-7f15-a0b6-223f45df41d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e83a7-a0f7-7e99-bdd0-cb40a22b3324" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e83a7-a0f7-7e99-bdd0-cb40a22b3324" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_DebtInstrumentBusinessCombinationFairValueLayers_019e83a7-a0f7-754d-a1ae-2625bcfeca79" xlink:href="fun-20260628.xsd#fun_DebtInstrumentBusinessCombinationFairValueLayers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7201-b16c-3af11a955727" xlink:to="loc_fun_DebtInstrumentBusinessCombinationFairValueLayers_019e83a7-a0f7-754d-a1ae-2625bcfeca79" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7c44-aea6-19cc0fdf732a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7c44-aea6-19cc0fdf732a" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-a0f7-7188-9106-2542a2131c91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019e83a7-a0f7-7d9d-a94a-cfe7de8ae327" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-a0f7-7188-9106-2542a2131c91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019fbd54-54ed-7bf2-8184-837b89d90a29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019e83a7-a0f7-7188-9106-2542a2131c91" xlink:to="loc_us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember_019fbd54-54ed-7bf2-8184-837b89d90a29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7fa7-aa8a-55808d781064" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7fa7-aa8a-55808d781064" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7fa7-aa8a-55808d781064_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7fa7-aa8a-55808d781064" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7fa7-aa8a-55808d781064_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7423-bda5-c8c20e7845aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e83a7-a0f7-7fa7-aa8a-55808d781064" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7423-bda5-c8c20e7845aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SevenParksMember_019e83a7-a0f7-7241-8fc3-c49a0ac59f4a" xlink:href="fun-20260628.xsd#fun_SevenParksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e83a7-a0f7-7423-bda5-c8c20e7845aa" xlink:to="loc_fun_SevenParksMember_019e83a7-a0f7-7241-8fc3-c49a0ac59f4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_019e83a7-a0f7-75bc-8bb9-73e436e04d47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:to="loc_us-gaap_ReportingUnitAxis_019e83a7-a0f7-75bc-8bb9-73e436e04d47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-75bc-8bb9-73e436e04d47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_019e83a7-a0f7-75bc-8bb9-73e436e04d47" xlink:to="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-75bc-8bb9-73e436e04d47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-7a13-8019-de03af5e3752" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_019e83a7-a0f7-75bc-8bb9-73e436e04d47" xlink:to="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-7a13-8019-de03af5e3752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsMember_019e83a7-a0f7-729f-99d1-6e8ab8dfe591" xlink:href="fun-20260628.xsd#fun_SixFlagsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-7a13-8019-de03af5e3752" xlink:to="loc_fun_SixFlagsMember_019e83a7-a0f7-729f-99d1-6e8ab8dfe591" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SchlitterbahnMember_019e83a7-a0f7-7a05-a3f4-e3507eb1ab00" xlink:href="fun-20260628.xsd#fun_SchlitterbahnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-7a13-8019-de03af5e3752" xlink:to="loc_fun_SchlitterbahnMember_019e83a7-a0f7-7a05-a3f4-e3507eb1ab00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_SixFlagsAndSchlitterbahnMember_019fce8c-151b-7fd0-8ba0-dc2ecb72e5ae" xlink:href="fun-20260628.xsd#fun_SixFlagsAndSchlitterbahnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_019e83a7-a0f7-7a13-8019-de03af5e3752" xlink:to="loc_fun_SixFlagsAndSchlitterbahnMember_019fce8c-151b-7fd0-8ba0-dc2ecb72e5ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassAxis_019eb71e-d019-78e9-87b9-9066c1d24d1c" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:to="loc_fun_IntangibleAssetsByMajorClassAxis_019eb71e-d019-78e9-87b9-9066c1d24d1c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019eb71e-d019-78e9-87b9-9066c1d24d1c_default" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019eb71e-d019-78e9-87b9-9066c1d24d1c" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019eb71e-d019-78e9-87b9-9066c1d24d1c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_IntangibleAssetsByMajorClassDomain_019eb71e-d019-7eb6-9fe5-29b7b5f73816" xlink:href="fun-20260628.xsd#fun_IntangibleAssetsByMajorClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fun_IntangibleAssetsByMajorClassAxis_019eb71e-d019-78e9-87b9-9066c1d24d1c" xlink:to="loc_fun_IntangibleAssetsByMajorClassDomain_019eb71e-d019-7eb6-9fe5-29b7b5f73816" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019eb71e-d019-7bc5-9a2d-8a3714d852ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fun_IntangibleAssetsByMajorClassDomain_019eb71e-d019-7eb6-9fe5-29b7b5f73816" xlink:to="loc_us-gaap_TradeNamesMember_019eb71e-d019-7bc5-9a2d-8a3714d852ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019fd234-7fe9-7e36-8209-39afdb3a4e4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e83a7-a0f7-7de2-a1e5-e5633e14c0ba" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019fd234-7fe9-7e36-8209-39afdb3a4e4f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019fd234-7fe9-7e36-8209-39afdb3a4e4f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019fd234-7fe9-7e36-8209-39afdb3a4e4f" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019fd234-7fe9-7e36-8209-39afdb3a4e4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019fd234-7fe9-7c0b-9886-f62e6715add1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019fd234-7fe9-7e36-8209-39afdb3a4e4f" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019fd234-7fe9-7c0b-9886-f62e6715add1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefinitelivedIntangibleAssetsMember_019fd234-bba8-7883-8251-b7e8c930f235" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefinitelivedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019fd234-7fe9-7c0b-9886-f62e6715add1" xlink:to="loc_us-gaap_IndefinitelivedIntangibleAssetsMember_019fd234-bba8-7883-8251-b7e8c930f235" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-a0f7-760c-9565-3d8982afe957" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7c44-aea6-19cc0fdf732a" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-a0f7-760c-9565-3d8982afe957" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019eb71e-d019-7391-925a-9747b401a382" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7c44-aea6-19cc0fdf732a" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019eb71e-d019-7391-925a-9747b401a382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-a0f7-7c44-bc56-fa23cc6cda98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e83a7-a0f7-7c44-aea6-19cc0fdf732a" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-a0f7-7c44-bc56-fa23cc6cda98" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/SegmentsNarrativeDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#SegmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/SegmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-74be-9650-06bf5b621ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-7908-a034-e89f5ad2b1b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-74be-9650-06bf5b621ee5" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-7908-a034-e89f5ad2b1b5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-7862-af14-6bbb9a92c03a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-7908-a034-e89f5ad2b1b5" xlink:to="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-7862-af14-6bbb9a92c03a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7862-af14-6bbb9a92c03a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-7862-af14-6bbb9a92c03a" xlink:to="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7862-af14-6bbb9a92c03a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7176-a159-412561939742" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-7862-af14-6bbb9a92c03a" xlink:to="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7176-a159-412561939742" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_019e83a7-a0f7-7ec5-b8ba-3f39da423c3c" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7176-a159-412561939742" xlink:to="loc_country_MX_019e83a7-a0f7-7ec5-b8ba-3f39da423c3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019e83a7-a0f7-7789-b022-6c40f5241930" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7176-a159-412561939742" xlink:to="loc_country_CA_019e83a7-a0f7-7789-b022-6c40f5241930" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019e83a7-a0f7-7361-9d40-b68479f4922d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7176-a159-412561939742" xlink:to="loc_us-gaap_NonUsMember_019e83a7-a0f7-7361-9d40-b68479f4922d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019e83a7-a0f7-7f26-89fc-42ad8fc4b17c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-74be-9650-06bf5b621ee5" xlink:to="loc_us-gaap_NumberOfReportableSegments_019e83a7-a0f7-7f26-89fc-42ad8fc4b17c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019e83a7-a0f7-7454-a795-7c4acb3d3bb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-74be-9650-06bf5b621ee5" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019e83a7-a0f7-7454-a795-7c4acb3d3bb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_NumberOfParksOwnedOrOperated_019e83a7-a0f7-7918-8abf-92d022187aa2" xlink:href="fun-20260628.xsd#fun_NumberOfParksOwnedOrOperated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-74be-9650-06bf5b621ee5" xlink:to="loc_fun_NumberOfParksOwnedOrOperated_019e83a7-a0f7-7918-8abf-92d022187aa2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/SegmentsScheduleofSignificantExpenseCategoriesProvidedtoCODMReconciledtoAdjustedEBITDADetails" xlink:type="simple" xlink:href="fun-20260628.xsd#SegmentsScheduleofSignificantExpenseCategoriesProvidedtoCODMReconciledtoAdjustedEBITDADetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/SegmentsScheduleofSignificantExpenseCategoriesProvidedtoCODMReconciledtoAdjustedEBITDADetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e83a7-a0f7-7dc5-b40c-f5f5bdb288a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e83a7-a0f7-7dc5-b40c-f5f5bdb288a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e83a7-a0f7-78b8-8118-e56d8d2da734" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e83a7-a0f7-7dc5-b40c-f5f5bdb288a8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e83a7-a0f7-78b8-8118-e56d8d2da734" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e83a7-a0f7-78b8-8118-e56d8d2da734_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e83a7-a0f7-78b8-8118-e56d8d2da734" xlink:to="loc_us-gaap_SegmentDomain_019e83a7-a0f7-78b8-8118-e56d8d2da734_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e83a7-a0f7-7438-ab02-241fb707f4d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e83a7-a0f7-78b8-8118-e56d8d2da734" xlink:to="loc_us-gaap_SegmentDomain_019e83a7-a0f7-7438-ab02-241fb707f4d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_AmusementWaterParksAndResortFacilitiesSegmentMember_019e83a7-a0f7-7e74-841d-edb1a98f7bb8" xlink:href="fun-20260628.xsd#fun_AmusementWaterParksAndResortFacilitiesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e83a7-a0f7-7438-ab02-241fb707f4d2" xlink:to="loc_fun_AmusementWaterParksAndResortFacilitiesSegmentMember_019e83a7-a0f7-7e74-841d-edb1a98f7bb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e83a7-a0f7-7937-8c12-69a4084b1d5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_Revenues_019e83a7-a0f7-7937-8c12-69a4084b1d5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_CostOfProductAndServiceSoldAdjusted_019e83a7-a0f7-75ae-97ce-e05b744a9317" xlink:href="fun-20260628.xsd#fun_CostOfProductAndServiceSoldAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:to="loc_fun_CostOfProductAndServiceSoldAdjusted_019e83a7-a0f7-75ae-97ce-e05b744a9317" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_019e83a7-a0f7-75e2-9915-38e34e769209" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_019e83a7-a0f7-75e2-9915-38e34e769209" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostDirectLabor_019e83a7-a0f7-72fa-9023-fdf8e5c99657" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostDirectLabor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:to="loc_us-gaap_CostDirectLabor_019e83a7-a0f7-72fa-9023-fdf8e5c99657" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e83a7-a0f7-78f4-84be-7abfdac48d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e83a7-a0f7-7188-927a-980fdbf7aca2" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e83a7-a0f7-78f4-84be-7abfdac48d9d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_EarningsBeforeInterestTaxDepreciationAndAmortizationAdjusted_019e83a7-a0f7-7669-8782-c2c153fdbb57" xlink:href="fun-20260628.xsd#fun_EarningsBeforeInterestTaxDepreciationAndAmortizationAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_fun_EarningsBeforeInterestTaxDepreciationAndAmortizationAdjusted_019e83a7-a0f7-7669-8782-c2c153fdbb57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e83a7-a0f7-7aa7-b10e-cdd6f1bfde53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e83a7-a0f7-7aa7-b10e-cdd6f1bfde53" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019e83a7-a0f7-757f-b02e-e390a14f74e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_DepreciationAndAmortization_019e83a7-a0f7-757f-b02e-e390a14f74e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019e83a7-a0f7-753a-adbb-f73171610b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019e83a7-a0f7-753a-adbb-f73171610b9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-a0f7-7d7c-894e-1c1530ddae13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_019e83a7-a0f7-7d7c-894e-1c1530ddae13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-a0f7-7ec3-8dea-fc3a329ccdbe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e83a7-a0f7-7ec3-8dea-fc3a329ccdbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherAssets_019e83a7-a0f7-70ff-927d-98dc581da8ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherAssets_019e83a7-a0f7-70ff-927d-98dc581da8ee" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-a0f7-7737-b78c-58d09a2fba02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019e83a7-a0f7-7737-b78c-58d09a2fba02" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-a0f7-7135-ae6c-4d7d2c2afb7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e83a7-a0f7-7135-ae6c-4d7d2c2afb7c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_NonCashForeignCurrencyGainLoss_019e83a7-a0f7-7fab-a4cd-c4e31f039232" xlink:href="fun-20260628.xsd#fun_NonCashForeignCurrencyGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_fun_NonCashForeignCurrencyGainLoss_019e83a7-a0f7-7fab-a4cd-c4e31f039232" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fun_ShareBasedPaymentArrangementNoncashExpenseAdjusted_019e83a7-a0f7-707c-9e6a-2121fe972789" xlink:href="fun-20260628.xsd#fun_ShareBasedPaymentArrangementNoncashExpenseAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_fun_ShareBasedPaymentArrangementNoncashExpenseAdjusted_019e83a7-a0f7-707c-9e6a-2121fe972789" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashMergerRelatedCosts_019e83a7-a0f7-7876-8680-4c1152a590ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncashMergerRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_NoncashMergerRelatedCosts_019e83a7-a0f7-7876-8680-4c1152a590ba" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_019eb720-8721-7dbd-b98e-0d8b94ae82cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeveranceCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_SeveranceCosts1_019eb720-8721-7dbd-b98e-0d8b94ae82cc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_019e83a7-a0f7-759e-90e6-586e828c1e75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e83a7-a0f7-763b-9eac-5dedcc64ed8a" xlink:to="loc_us-gaap_OtherExpenses_019e83a7-a0f7-759e-90e6-586e828c1e75" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-a0f7-77c8-adc4-b6488f1260d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e83a7-a0f7-7117-978b-40092ecd0c6f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-a0f7-77c8-adc4-b6488f1260d9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.investors.sixflags.com/role/SegmentsScheduleofLonglivedAssetsNetRevenuesandIncomeLossBeforeTaxesDetails" xlink:type="simple" xlink:href="fun-20260628.xsd#SegmentsScheduleofLonglivedAssetsNetRevenuesandIncomeLossBeforeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.investors.sixflags.com/role/SegmentsScheduleofLonglivedAssetsNetRevenuesandIncomeLossBeforeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-78fe-83f3-3a7cfbdb53bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-749b-8c26-a888b24ee090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-78fe-83f3-3a7cfbdb53bd" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-749b-8c26-a888b24ee090" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019e83a7-a0f7-749b-8c26-a888b24ee090" xlink:to="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4" xlink:to="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7930-b736-b048c0a40379" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019e83a7-a0f7-75c3-aa9a-e53b25ed5dc4" xlink:to="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7930-b736-b048c0a40379" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019e83a7-a0f7-71e9-a10a-2d0086964e05" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7930-b736-b048c0a40379" xlink:to="loc_country_US_019e83a7-a0f7-71e9-a10a-2d0086964e05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019e83a7-a0f7-71a3-9035-2ee80ec781a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e83a7-a0f7-7930-b736-b048c0a40379" xlink:to="loc_us-gaap_NonUsMember_019e83a7-a0f7-71a3-9035-2ee80ec781a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_019e83a7-a0f7-7452-ac2b-6c9941e55bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-78fe-83f3-3a7cfbdb53bd" xlink:to="loc_us-gaap_NoncurrentAssets_019e83a7-a0f7-7452-ac2b-6c9941e55bb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e83a7-a0f7-7759-9812-a113bfd52e94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-78fe-83f3-3a7cfbdb53bd" xlink:to="loc_us-gaap_Revenues_019e83a7-a0f7-7759-9812-a113bfd52e94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-a0f7-7545-b7bc-789393f1d891" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019e83a7-a0f7-78fe-83f3-3a7cfbdb53bd" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e83a7-a0f7-7545-b7bc-789393f1d891" xlink:type="arc" order="2"/>
  </link:definitionLink>
</link:linkbase>
